A couple of hours before the official announcement many websites are already posting the Panasonic and Olympus specs and images:
E-PL5, XZ-2 and 60mm macro and 17mm lens:
XZ-2 press (Click here) and E-PL5 press (Click here). Clubsnap posted the full E-PL5 press release! The XZ-2 Clubsnap press text is also available. 60mm macro presentation at Clubsnap.
GH3 specs:
Official specs at Dpreview.