Please Pass the Pixel Patterns
I don’t use tiled patterns very often, but I couldn’t help but bookmarking and sharing this great resource: Pixel Patterns.
Following a social model, they allow you to submit, search, and use the patterns as long as credit is given to the author. The interface is sleek and full of AJAX wonderment. They are at 903 patterns and growing, so finding something you can use shouldn’t be an issue.
And while you’re there, be sure to check out the parent site Kaliber 10000 - The Designers Lunchbox. Lots of great stuff throughout the site.