Robbie Groenewoudt, a Dutch student, created a service that taps into Gmail and indexes all the files which will be accessed by other users.

G2G Exchange is the name of this new Web-based service. Those 2 gigabytes from Gmail are used now for file sharing. In order to upload content to share, users must send themselves an e-mail with the file attached, but Google imposes a 20MB limit per message. Alternatively, tools such as Gmail Drive or RoamDrive that interface with Gmail’s API can be used to upload files directly.

The directories are represented by Gmail labels and every account is indexed every 24 hours. The download is made from Google’s network because all the content is stored on their servers.

G2G is still in beta but it has a lot of supporters. “This project is hard to make and to run. However, I’m rolling out more updates than I breathe,” Robbie Groenewoudt wrote on his site.

Unfortunately if Google decides not to let these type of application to be used on its servers, there won’t be any G2G service.