Pretty much everywhere they are selling iPods there are now Sega iDogs.  They listen to your music and shake their head and flash their colors and make sounds to the music your are listening too.  If you click the link above there is a Mini Movie of one in action in the bottom right.

It seems like dogs have been all the rage for the last couple of years with The Dog, Nintendogs and now iDogs.

One Step toward Star Trek viewers?
My First MP3 Player