By now you've probably heard about Cloverfield, kind of a Godzilla meets reality TV meets Blair Witch movie. The idea was to make it seems like the person shooting was actually shooting for themselves on a personal camera.
As it turns out, much of it was shot on a Sony CineAlta, one of two or three high-end cameras good enough for "film," but they also used an HVX200 and a Panasonic HDAVC model (both of which I happen to own). That's pretty cool stuff! There's a brief article in HD Magazine.