I’m a fan of silicon “boobie”-mouse-pads. I like manga-characters and actually think this type of mouse-pads are the most ergonomic ones I’ve ever tried. I work as a programmer, so I sit in front of the computer a lot!
Now there’s apparently also boobie iPhone cases in Japan (that’s what I call it – no official name ^^). The silicon boobs do probably not have any ergonomic function ^^ but maybe they are nice to play with for those who dares to use it in public. I would! ^^
You find them at Rakuten!