A "blurry" photo reveals some details about Android "Gingerbread" 3.0 (or 2.5) release. The photo is claimed to be a shot of a Nexus One running Gingerbread. Phandroid claims that Google's going for a darker look, rather than the lighter defaults in previous versions of Android, and has unified the entire experience, with green being (unsurprisingly) the key color throughout the OS. The built in Google Apps are getting an overhaul too, and have been redesigned to fit into the experience better.
They also say that Google has adopted the "bouncing" menus similar to that of iOS, this's when you're scrolling past the edge of a list, it'll essentially "bounce" of the edge of the screen.
In addition to visuals, Gingerbread is pinned to have VoIP support for Google Voice, and that the OS actually feels faster than Froyo does currently.