A video demoing some of the newer features that's already made it into post-Alpha 1 Natty is available. It's nothing too fancy, but the new intellihide feature is definitely greatly appreciated. Having the panel discretely move out of the way just makes Unity that little bit nicer to use.
Unfortunately for me, the instructions on creating a LiveUSB to test run current Unity doesn't seem to be working. The LiveUSB works, but I can't seem to get persistence working which basically means the new updates aren't available. That's even more so thanks to the recent Python 2.7 migration that's going on.
Ubuntu's Unity on the desktop
Unity as the default Ubuntu desktop