2. Firefox Sync, which syncs bookmarks, tabs, passwords, history, and formfill data to all your different computers -- and to Firefox for Android. Firefox Sync encrypts your data client-side for privacy and security, and you can run your own sync server if you want to. (There are multiple open-source server implementations.)
Chrome 10 can encrypt everything client-side too.
http://www.google.com/support/chrome/bin/answer.py?hl=en&...
That does seem to imply that only passwords are encrypted while in storage. That's not surprising, since Chrome has a "master password" for password encryption, but unlike Firefox it does not require transferring an encryption key for your other sync data. (The client-side encryption key is the reason you need to "pair" your devices to set up Firefox Sync, instead of just entering a username and password.)