I found 140 cool high resolution patterns and backgrounds for as low as $1! I've not actually downloaded yet, but thought maybe some of you guys might want to. Here are the links:

photoshoproadmapdotcom/Photoshop-blog/2011/04/26/download-50-beautiful-high-resolution-patterns-for-photoshop/

photoshoproadmapdotcom/Photoshop-blog/2011/03/23/30-grunge-dirty-and-rusty-high-resolution-tileable-backgrounds/

photoshoproadmapdotcom/Photoshop-blog/2009/03/20/60-beautiful-high-resolution-paper-backgrounds/