Need to store important stuff? Try Clipperz - More than a password manager.

It uses javascript to encrypt your data before sending it to the storage server, so the data should be safe.

I'm toying with the same kind of idea for my client's remote backups. I can't guarantee that the web servers I rent have the security needed to protect their sensitive files, but that doesn't matter if the data is encrypted before it's sent, it should be fine.