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 copy of the April 2009 issue of Shutterbug or read my E-30 review online to see examples of images made with each of the filters. But get this YouTubers: you can apply any of those Art Filters, including Pop Art, Soft Focus, Pale & Light Color, Light Tone, Grainy Film, or Pin Hole, to any video clip you capture."   Link