There are thousands of P2P
sites, as there are literally thousands of clients. General P2P-community sites are less common, but there are many!
First try the links on
VLAIBB's site.
NapJunk &
P2Pzone are 2 to keep your eye on. Then there are more specific sites eg.
KazaaLite,
FastTrack,
Gnutella,
eDonkey, Blubster, Soulseek etc.. Keep in mind that many "topical" sites cover general p2p as well!
I was concerned that the shutdown of all the centralised systems, particularly AG, would further splinter the p2p public but I'm seeing signs of the opposite occuring!
BTW AG still has a large community & the forums, particularly
FAQ, have become a very busy general p2p discussion area.
So to sum up, there are quite a few others!