Sega has put out eighteen Samba de Amigo screens that among other things demonstrate the multiplayer mode in the game.
Of particular note is Sonic pops up in one of the shots. He seems to be dancing. We're not sure if this is one of the best things we've seen so far from E3 or just another humiliating act that Sega puppet masters have forced him to do.
Overall though, the game looks great. Trying to convey a rhythm action game through images isn't easy, but the visuals really match the game. It's cheesy, camp and cringe worthy, but if you can drop your inhibitions we found it fun to play.