I just love it when someone takes the time to do a detailed review of a broad spectrum of user interfaces, with loads of comments and pics. Matt Buchanan, of Gizmodo, has done so in his recent post, Click: A Visual Tour of Camera Interfaces. Matt has a nice section dedicated to cameras with touchscreen user interfaces, with all of the touch-screen pictures in one spot. He liked the Sony camera touch screen UI the best.
I liked one of the comments to Matt's post:
"Yeah, but when will they come out with a UI that my grandmother can use on her own without calling me every d--- time she wants to know how to turn on the camera and take a picture?"