Sony has announced a pair of interchangeable-lens cameras at IBC (announced might be too strong a word… previewed?). Take a look at the rundown from some dude’s blog.
The little guy is pretty cute. Smallish CMOS chips, but you can swap the lens, including adding SLR lenses with the right adapter. I haven’t seen US press releases on these yet, nor model numbers, so I wouldn’t expect anything concrete until NAB08.