AllPeers
I've been waiting for this a long time. AllPeers is a method of file transfer that lets you set up your own private network of peers with whom you can send and receive files of unlimited size. There's no more need to email a bulky file and wonder whether it's going to get through. Add friends and family members who also use AllPeers in the Firefox web browser, and decide what files you want them to be able to get from you. Click here if you have Firefox, to go to the download page for this extension.
Supposedly they're going to eventually open the source code. Also, supposedly this method is much faster than sending files through email or an instant message client, because it incorporates BitTorrent technology.
Just one neat example of a little trick you can do with this, is instantly share a screen shot with a peer who's online... such as a tech support scenario.
My username is MattArnold. Add me to your networks!