its not he same thing, but gmail offers something like g-disk drive, you can mount one on serwer working as your drive, and then open it on another pc using you account details, or something of that matter.
the con is you need to use your account forthe drive, no switch-overs, unless you want to give your pass to someone.i mean, u can set up an account, just for sharing. but the other person has to set it up aswell. etc.
the pro is - its up to 2gb.
im not using it myself, but seen it doing the right job at friends house.
more info on google.