GMail Drive

http://www.evhead.com/

"gmail drive literally adds a new drive to your computer under the my computer folder, where you can create new folders, copy and drag'n'drop files to."

like the thing that showed up for linux a while back, now for windows.

idea: extend it so that any files that show up as attachments in your inbox show up in the 'drive,' as well. and to offline-synch.