Well, it was bound to happen, sooner or later. GMail's generous capacity and bandwidth was already being used as a GMail Drive and now it is being used as a P2P sharing service. All you have to do is register at the G2G site and provide a GMail account (preferably a new one). You can download files shared by other users. To upload you have to log in to your GMail account or just use GMail Drive.I wonder how long this will survive before Google puts its foot down!
here's the link to g2g exchange
source - osnn