[Grim Tuesday]

Im a bit confused as to why you would want a personal cloud (besides the awesome factor). It seems that with Google Wave (if you don't have it, then why not!) that is exactly what you are asking for. It's perfect for communicating ideas around, and although not top secret, I doubt Google with disseminate your ideas to other teams.

Cloud computing, is also more for distributing the load of something: Amazon distributes the load of servers, F@H, I guess is technically a cloud. Unless you are doing so ridiculously heavy compiling, then I doubt you need one. It should also be noted that the term "cloud" computing defies having a personal one XD