According to Engadget, Panasonic is working on a 3D lens for its Micro Four Thirds cameras (G1 and G2), and plans to ship it by the end of the year. The 3D lens will use the Lumix G-series mount. It will operate on the same principle as the snap-on 3D lens just announced for the HDC-SDT750 camcorder; the right and left eye images will be split and recorded together on one imager. The focal length and aperture range of the lens hasn't yet been disclosed, and the lens shown by Engadget is still a prototype.
Panasonic is clearly very serious about 3D for both camcorders and DSLRs, and it'll be interesting to see how other manufacturers respond.