PC mag had an article on how to do this, tried it out this morning, and it works, pretty neat.
All you do is download the drive shell extention from HERE
Run the .exe, and your basically done, open up "my computer" and you 'll see Gmail as a drive.
Now you can store things in there and it will automatically upload to your email account. All the emails get sent with the subject "GMAILFS", so what you can do is set up a filter on your gmail account that takes all emails with that subject and automatically archives them, that way all the files won't clutter up your inbox.
Thought some people here might be interested.