Gingerbread ROMs are being ported from the 2.3 SDK device emulator left and right. As of this writing, we have the Eris, the Hero, the Wildfire (pictured, and video after the break), and the Evo 4G all booting up Gingerbread, and I'm sure we probably will see more, the OG Droid and Droid Incredible can't be far behind.
It's awesome, just because it's awesome. Booting up Gingerbread and looking through the UI on a device it a load of fun. Don't expect too much going in, and be sure to have a good backup to return to, then give it a whirl. There's a video after the break to give you an idea of what to expect for the most part. [Eris; Hero; Wildfire; Evo] Thanks everyone who sent these in!
YouTube link for mobile viewing