Online free storage - Store files in the cloud - file folder synchronization

http://www.readwriteweb.com/archives/free_online_storage_services.php

http://www.gottabemobile.com/CommentView,guid,704c3151-cbdc-40e2-81f6-1b9a14cceb6e.aspx

http://en.wikipedia.org/wiki/Live_Mesh
http://en.wikipedia.org/wiki/Windows_Live_SkyDrive
http://en.wikipedia.org/wiki/Windows_Live_FolderShare