I've been studying the sample pics and the threads on the Samsung NX10 around the web, and in a word, stunning.
The slow kit zoom lens is unfortunate only in its speed. I guess they couldn't really put a fast lens in the kit and keep the price low. But aside from that, this camera looks like a winner.
It has, most especially, eliminated any interest I had in micro 4/3rds.
Courtesy of a forum that shall not be named, here's the sample that convinced me. The Panasonic GF1 (a very nice micro 4/3rd camera) versus the Samsung NX10:
Crop of the above: