This is great:

C&F has more links to happenings around the assclown "Truther" movement, as does AllahPundit. I intend to check some more of this out later. The biggest issue is that there is growing popularity of these idiotic theories, mainly because I guess people don't take the time to check if there is debunking information. The scary music, quick images, and seemingly damning fast rattled off quotes seem to make a case. But plenty of people have slowed it down and torn these pathetic conspiracy theories apart, point by point. One of the best known examples would be the "Screw Loose Change - Not Freakin' Again edition". Now playing here at RightWinged.com:

And as always I have to include links to this thorough debunking specifically focused on the Pentagon portion of the conspiracy theories, as well as the Loose Change II viewer guide which is a point by point debunking companion to have in hand while watching the crockumentary (damn, thought I'd coined a term). And of course you should regularly visit the Screw Loose Change blog.

...Almost forgot to mention - Check out the creator of Screw Loose Change, Mark Iradian's site where the video is posted as well. Thanks to Mark for the great work on the vid.