Idea: Using Pop3 servers as online file storage

I've done a quick google, and can't find this anywhere, so here's the idea.

You should be able to construct a standalone app or an explorer integrated thing that looks and acts like file storage, but connects to a pop3 server and actually stores files as encrypted attachments of some kind. You might go for the hotsync style where you synchronise a local folder with your online storage, and can sync from online to local or from local to online, or some clever combo.

With such a piece of software, a pop3 account becomes file storage for backing up, or for centralising your files between machines. Excellent!

Add to this that you can get gmail accounts with 1gb of storage, and that you can get pop servers that talk to gmail, and suddenly you've got some very decent free online storage.

Emlyn