The folks at 4/3 Rumors believe they've spotted Panasonic's successor to the compact Micro Four Thirds GF2 -- the aptly named GF3. The site's eagle-eyed camera fiends noticed an unfamiliar digicam in a promo video (since removed from YouTube) that sports an interchangeable lens and is smaller than a DSLR. The design of the camera is somewhat similar to the GF2, though it sports a more pronounced hump and a more modern look. Rumors have suggested that the GF3 would lose the hot shoe, which this glossy-white mystery device clearly lacks, and borrow the 16-megapixel image sensor from the