:P it is actually a forum but they diveded category nicelyI like http://www.pornrapidshare.com/ I guess strictly speaking its not a forum but it has plenty of content.
Hate to mention my own however Warez-Project is getting an average of 700+ new posts in the XXX section alone lately, daily.
We're actually the second highest from the forums mentioned so far here with the exception of Porn-BB.
Pikeypete