This is nearly and might be exactly what I'm doing with the EyeFi card. They take snaps and automatically the jpgs fly over to the pc. I've tried this on too many cameras to date.
Also noteworthy are Breeze systems.
Looking for a not-too-expensive camera that can output .jpg files directly to a computer via USB in real time; that is, compose the shot on the screen then capture the shot as a file. This would be used for documenting ongoing work, and I'd like to avoid the hassle of shooting to a card, then having to pull out the card and put it in the computer. I don't need interchangeable lenses, but the camera lens should zoom and autofocus. All recommendations much appreciated.