It is very interesting to note that the E-P1 supports Contrast Detection Auto Focus, aka CDAF with all Zuiko Digital lenses. Since I have 4 Zuikos, this is great!
My experience with the Zuiko Digital ED7-14mm is so far very satisfying. With the MMF-1 adapter, the balance and feel is good. A bit lens heavy, though!
With the E-P1, only Single Auto Focus works. And, during Manual Focus mode, the MF Assist is great providing 7x magnification with the slightest touch of the focus ring.
7mm, f7.1, 1/640s, ISO100, -0.3ev
A shot of my daughter on her bicycle. Since Continuous AF is not supported, I used the pre-focus technique to get the shot. Shutter speed was adequate to freeze the motion.
Macro with the Zuiko Digital ED50mm F2.0 MACRO lens is superb. In Manual Focus, the MF Assist is a blast!
Don't worry, Olympus engineers have done wonders to ensure inter-compatibality between Fourthirds and microFourthirds! And the results are very reassuring!