Japanese techno-pop band "TELESCOPE" (
http://tele-scope.jp/) created a cool LED-mimi for their live performance. LED-mimi is transparent and you can see some chips, LESs and circuits inside. Looks cool isn't it?
(*You can check their music at soundcloud :
http://soundcloud.com/telescope_disco)
necomimi can exchange each mimi-parts, so ofcourse you can make your own mimi-parts for necomimi like this!