Many people ask about the location in the Registry or file system that applications store the passwords. Here is a list of password storage locations for popular applications compiled by Nir Sofer.
Be aware that even if you know the location of the saved password, it doesn’t mean that you can move it from one computer to another. many applications store the passwords in a way that prevent you from moving them to another computer or user profile. (more…)

The new version of Foxmarks is finally out. You can now sync your passwords across your computers. Password sync is 100% optional and is turned off by default. Your passwords are secured by encrypting them with an AES 256-bit encryption algorithm before they leave your computer with a PIN that only you know. You can also assign your passwords to sync profiles to keep your personal passwords at home, and your work passwords at the office.

Check it out: http://blog.foxmarks.com/?p=184