How do I get patterns like fluther.com background?

iStockPhoto.com has patterns like this one. In fact, they have this one. It's not free, but it's quite cheap ($1 US).

iStockPhoto.com is probably your best bet. But if a dollar is too much to spend then you can grab Fluther's from http://fluther.com/static/images/v2/wallpaper.jpg BUT and I mean it if you are going to STEAL their artwork at least save a copy to your computer and upload it to your site or a file hosting site like photobucket.com

It would, in fact, be stealing to use Fluther's because they bought it off of iStockPhoto.com and everything there is copyright protected.

I mean legally and not exactly this one, but similars. I was thinking about something like sxc.hu, but that's fine, iStockPhoto is my solution.
=)

You might want to take a look at Squidfingers. See:
http://www.squidfingers.com/patterns/
There may be others but this was one of the first web sites to offer pleasant patterns of this kind.