One of the users on their forum said that if you crack it open, there's still a bunch of empty space. Even though it would raise the cost a little bit, I'd like to see it add wifi, bluetooth, powerline networking (so it could act as a router between powerline and ethernet) and X10/zwave compatibility. Those things wouldn't add more than $20-50, and it would make the SheevaPlug a kind of hacker's Swiss army knife.