"Comparing" is a tad harch, its more like an apples to oranges and Klingons to Jedi thing:
 
"This article compares all the affordable weather-sealed DSLR cameras in production. These DSLRs are the Canon EOS 7D, the Nikon D300S, the Olympus E-3, the Pentax K-7, the Pentax K20D and the Pentax K200D. The definition of weather-sealed varies between models but does not mean waterproof, so all DSLRs

The E-P1 is practically the same as the E-P2 minus the added electronic viewfinder addon thingie:
 
"The E-P1 is chockablock with many features it has graciously stolen from E-series SLRs, including in body Image Stabilization, a kick-butt dust reduction system, multiple exposure capability, and Olympus’ now-famous Art Filters. Rather than discuss these capabilities any more than I have in the past, pick up a

Ladies and Gentlemen, we break the CaNikon review monopoly with a take on the Oly E620 by NeoCamera:
"In terms of image quality and performance the E-620 does quite well without being class-leading in any area. Despite the small sensor, image noise is kept low and dynamic-range is excellent. The autofocus performance is slightly below average but the camera always responds quickly."

Reading the text might get you dizzy, but pictures are as always worth more than words:
"Does not GF1 is equipped with image stabilization and you say No, the target LUMIX G 20mm F1.7 ASPH. And LUMIX G VARIO 7-14mm F4 ASPH. Maikurofosazu two lenses to use the book except Panasonic I do not feel a lack in any way. Because it has image stabilization capabilities in the lens

In short:
"Today Olympus is pleased to announce a software update service for Olympus Master.

This update, Olympus Master 2.3, allows the development of E-P2 RAW files using the Diorama and Cross Process Art Filters and iEnhance picture mode using the Windows 7 and Mac OS X v 10.16 (Snow Leopard) Operating Systems. "

Hot off the factory, here comes the first "major" review of the E-P2:
"One more good point: when you press the button at the back of the viewfinder, you not only turn the screen off for shooting, you also turn the screen off for adjustments, chimping and photo viewing. The signal obviously completely switches to the viewfinder. Great thing for those who complained about the viewing scrren glowing in the dark.

Very small and handy, it's the latest camera from Olympus in the struggling fourthirds format: 

"Another feature borrowed by the E-520 from the pocketcam's repertoire is panorama photography. However, this feature requires more guesswork with this hardware than it does in the point-and-shoot world. Ordinarily, when you take a shot in a panorama sequence, the transparent edge of that shot appears at the edge of the LCD. As you move the camera to set up the next shot in the sequence, you can easily overlap the beginning of the new shot with the end of the old by using the transparent sliver as a guide.

The four thirds system turned out to be a failure more or less from a bussiness perspective at least. I don't think Olympus intended to stick with less than 3% of the worldwide dslr market when they announced it 3 years ago. The MICRO four thirds system however seems to cover a real gap between traditional dslrs and digicams. 

Continuing the trend of "digicamization", here comes Olympus latest with face recognition and 32 (yay!) shooting modes.:

Olumpus Press Release:

Everything Comes Into Focus With Olympus E-520 Digital SLR: Advanced IN-BODY Image Stabilization and Autofocus Live View Deliver Sharp Images

In-Body Image Stabilization Steadies Any Lens; Take-Anywhere Portable Design Means You'll Capture It All

CENTER VALLEY, Pa., May 13, 2008 – The new Olympus E-520 digital single lens reflex (DSLR) camera delivers brilliant images thanks to advanced technologies that help take the blur out. Industry leading Image Stabilization built into the portable camera body compensates for movement so that images are sharp and blur-free with any lens and even at slow shutter speeds. Autofocus Live View brings subjects into sharp focus on the camera’s HyperCrystal™ II LCD. Together, these technologies produce amazing results, along with the following features that further expand the DSLR experience:

Pretty short and to the point. Excerpt:

"The body is festooned with buttons which are supposed to make setting any mode a quick experience. I actually found the set up quite challenging. We had the opportunity to shoot fashion, reportage using wireless flash and extremely low light interiors, each needing very different use of modes and menus. Changing from something a simple as Program to Aperture Priority, for example, is better served on cameras with a mode dial on the top plate. I guess with time the use of all the features would become second nature but they don't appear as intuitive."

Link

Well, not two dozen, but pretty close:  A bunch of Olympus users were invited by Olympus UK on a "photo safari" weekend with the new E-3.

We quote:

"LiveView is excellent, with a similar lag to the E330 in B mode. The only thing that I didn't like was not being able to pull the screen up behind the camera to act as a discreet waist-level VF. I rarely use LV A in the E330 for shots with moving subjects, so the lack of LV A in the E3 will not make much difference to me"

More Olympus in the news. This time, Reuters reports that Olympus, just like Sony and Pextax have done previously, they too want a 20% Dslr market share.  So, if the math lines up for these 3 companies, either Canon or Nikon or Both will be forced to exit. Yeah, right :)

TOKYO (Reuters) - Olympus Corp (7733.T: Quote, Profile, Research) said it aims for a global share of 20 percent or more in the digital single lens reflex camera market in five years, more than doubling its current share in a sector dominated by Canon Inc (7751.T: Quote, Profile, Research) and Nikon Corp (7731.T: Quote, Profile, Research).

Digital single lens reflex (SLR) cameras, high-end models with interchangeable lenses, are the most lucrative segment of the digital camera market.

"In the mid- to long-term, we will strive for a 20 percent market share or more to become one of the top three SLR makers," Olympus Imaging Corp President Masaharu Okubo told a news conference on Wednesday.

Olympus Imaging is the camera unit of Olympus.

Olympus press release:

CENTER VALLEY, Pa., October 16, 2007 – Launching together with the new Olympus E-3 Digital SLR (single lens reflex) camera, Olympus proudly adds three new ZUIKO DIGITAL™ lenses to its line of 100 percent digital-specific optics. These innovative lenses employ Olympus’ newly-developed Supersonic Wave Drive™ (SWD) technology inside to provide quiet, ultra-fast autofocus (AF) speed, and offer several impressive distinctions, including:
New ZUIKO DIGITAL ED 12-60mm f2.8-4.0 SWD, in combination with the E-3, delivers the fastest autofocus speed in the world.
The ZUIKO DIGITAL ED 50-200mm f2.8-3.5 SWD focuses twice as fast as the previous ZUIKO DIGITAL lens with that focal length.
The ZUIKO DIGITAL ED 14-35mm f2.0 SWD joins the existing ZUIKO DIGITAL 35-100mm f2.0 as the brightest fixed aperture lenses in their class.

There are already a number of previews out there (and strangely none of them is done by dpreview.com) we selected two that stands out so far:

Imaging-resource.com :

"The E-3's four-way navigator, which Olympus calls an Arrow pad, is well-positioned for easy access, and it's even angled a bit toward the right to accommodate the thumb's angle of attack. Other buttons on the back and top are clearly marked for easy comprehension. The Olympus E-3's rear LCD also serves as a Status display whose settings are accessible via a press of the center OK button"

Fourthirdsphoto.com :

Roughly 4.5 years after the introduction of it's predeccesor and almost 6 months since the leaked Pdf file (containg all the specs) the E-3 is finally officially with us. Although the 10 mp sensor, 5 fps and 11 Af points might seem like a blast from the past, in reality this camera ups the ante in a number of ways, most impressive of which is the up to 5 stops built in image stabilization.

Press Release

OLYMPUS BREAKS THE AF SPEED BARRIER WITH THE WORLD'S FASTEST AUTOFOCUS TECHNOLOGY IN NEW DIGITAL SLR CAMERA AND LENS

E-3 Digital SLR Combined with Zuiko Digital Specific SWD 12-60mm (24-120mm Equivalent)
Lens Delivers Fastest AutoFocus Technology to Photographers