That Ricoh GXR camera system we saw yesterday has today become official, and dpreview have gotten on the case to provide an early preview and a set of sample images taken with the shooter. The novelty to this new setup is in the so-called lens units, which contain both a lens and an appropriately matched sensor inside a sealed casing. This precludes dust from getting in where it doesn't belong and provides a tailored pairing of optics and electronics. The body, in spite of not doing much -- zoom motors plus aperture and shutter mechanisms are all handled within the lens unit -- is built out of a magnesium alloy, and its major attraction will be a good control scheme allied to excellent ergonomics, according to dpreview. What you're getting then, is a competitor to Micro Four Thirds that's smaller in size, but larger in price. Sounds about right.
Read - Press release
Read - dpreview preview
Read - Sample image galleries
Read - Comparison shots vs. the Panasonic GF1