Thanks for replying TranceTip. I don't know how to implement RSA encryption on these peer to peer networks yet, as I have never looked at the code. However, I do work with distributed networks and such as work and college. Strong key encryption would require a client that supports it, obviously. There are a bunch of different approaches depending on how the network is structured. It may be possible only with a network restructuring, and it would be unhelpful to the community to fork a new network. I am going to take a look at the source code for a few open source GNU network clients and see how encryption could be fit into it. However, I am very unfamiliar with how the network is set up.
I am sure there are resources out there though, right?

If anyone has any ideas of has some experience and think they might know how to put encryption into the peer to peer GNU network, please post/email me. If I get enough support I wouldn't mind hosting a site dedicated to getting this done.

BTW, I am really passionate about this subject. Everyday when I read about companies/governments cracking down on file sharing I grow more worried.