The Magic Lantern team have managed to create RAW video files on the 5D Mark II and III. It’s in the early stages and is currently more or less unusable for video due to the buffer rate of the camera and card speeds. There’s a good overview of the current state of the RAW experiments over on EOSHD.
At the same time, Blackmagic’s recently announced pocket cinema camera is set to ship in July with RAW and ProRes recording, priced at USD $995, footage of which can be seen here. This is all rather astonishing news, seeing as RAW didn’t seem to be something the prosumer, let alone the consumer market, would see for a long time.