Oh Whoo I've thought of another idea. Can you add an extra column to the warez forums with either vb, ipb, phpbb, smf, mybb or other to all the sites. Their's no need to keep this updated as these only change in extreme circumstance.

Reason I think it should be added is so threads like this where the original poster doesn't update the thread can be closed and they can refer to your site which is far more useful.

Their's also currently a slight bug as skdown.net is showing top of the list (ahead of WBB) as it doesn't yet have an alexa rank. Maybe make sites without an alexa appear last instead of first.

Other than that I think this site is a great idea and really useful for webmasters.