CLEAN P2P is still unethical, illegal and immoral.
While there may be some non-copyrighted material at CLEAN sites, I feel te vast majority go ther to steal.
Posting such a list is analogous to listing 24 hour convenience stores whose proprietors don't have a rifle behind the counter. Sort of like saying "hey, you can steal from this site without any guilt nor adverse side effects!!!"
While I do not support the routine use of peer-to-peer, as it is one of the most prolific sources of virus distribution, this article is a must for those who do access it, as an aid in deciding which software and network is safer. http://www.spywareinfo.com/articles/p2p/

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic