Panasonic officially announced the previously rumored compact cameras and MFT lens at CES (the upcoming GF8 will probably be announced during the CP+ show in February):
Panasonic Leica DG Vario-Elmar 100-400mm f/4-6.3 ASPH. POWER O.I.S. lens
Panasonic Lumix DMC-ZS100 camera
Panasonic Lumix DMC-ZS60 camera
Additional information:
Press releases:
Here is a Panasonic 100-400 lens size comparison from camerasize.com (via dpreview):