Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Hmm I've been looking into getting one myself. I had a friend who had a plastic one.. but he said those were terrible since they crack (probably cause he was careless).

The main issue I'm worried about with these cases is heat. Especially since the MacBook gets quite hot when the AirPort Extreme is in use.
 
http://www.hardcandycases.com/macbook-bubbleshell.html

BSMAC13BLU_Hero.jpg
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.