Look at his ears go!
The iDog is a Sega toy released this spring. It listens to music, dances with rhythm, sings songs, responds emotionally to touch with different lights, and you can hook up an external player to it (not just an iPod).
We were fiddling with it earlier this evening at Eliza's, trying to figure out this robot dog (like the geeks we apparently are)...
http://www.idog-segatoys.com/