Finally a program that allows you to share music/pictures/films securely and privately with the people you choose. With Grouper only members of your private group, that you invited, can access your shared resources. All traffic encrypted with AES using a 256 bit key. There is no global network or index so only your friends know what you share. More of a Friend To Friend (F2F) than a Peer To Peer (P2P). It also has a encrypted chat that works in user and group modes.
It should be more politically acceptable than waste as you can stream, but not download, copy protected MP3's an WMAs. Computer savvy users will get around the restriction by sharing zipped versions. You can limit the number of parallel downloads but it does not support bandwidth throttling. I have not tried it, but it should be possible to limit the upload bandwidth using NetLimiter. Http proxies are not supported yet but they are working on it.
A great way to share my resources with friends and family that I only see once a year!