This Friday I checked out some more cameras, in particular I compared the Lumix GF1 and G1. The G1 did make a really good impression: Logical controls, good viewfinder, autofocus settings I get along with and a good enough focus speed and reaction time. The last here was enough (if the cost hadn't been) to make it seem more interesting than the X1, as I didn't think it was as fast to work with. Probably it helped with focusing that the lens I'm interested in is the quite fast 20mm/1.7.
But it isn't quite as small as what I was looking for. GF-1/E-P2 instead, but with the same lens?