I was going to hold off, but got antsy and ordered one up. A few pics. Short story is much better performance than the K20 wrt AF, fps and general performance. It seems to shoot a bit hot, so I'm dialing in some negative exposure comp. Size is a bit bigger than G1, certainly smaller than K20d. Jury is out if it is too small though the grip shape is nice. My thumb is a bit big though.
The 43/1.9 is a very nice fit as is the 35ltd. Pics later.
These were taken without exposure comp. There is a significant jump going to -0.3. This is indoors in a very dark room, iso 800 or 1600, shutter speeds as low as 1/5 sec.
I particularly like the way these convert to b&w - I like the grain (this is iso 800)
And for size ( K7 with 50-135*, K20d with 16-45,)