I've actually been working on such a thing for the last two days if anyone is interested in pitching in. Basically, it's a secure way to backup and restore your wallet to the cloud. Will use a P2P system for redundancy and AES-256 bit encryption for the wallet files. Both client and server will be open source so it can be run by anyone and will run on Linux, Windows, and Mac. Continued development will hopefully be community funded.

Screenshot of client (progress so far) attached.

Thoughts? Ideas?
https://docs.google.com/leaf?id=0B7CaoA7d1ppxNjg3NjBlNTktM2M2NS00ZDZhLTg4ODYtOGUxYmRlMTdlZTY3&hl=en