I took a photo of a metal grate at the base of a tree. I used various photo editing softwares on my iPod. An easy way to create a starburst texture.
I took a picture of this statue in Rome located at a castle near the Vatican. (the Pope wasn't available that day) Used a cool little app on my iPod to apply a filter, then transferred to my computer for more editing. If you don't like it, at least it's free.
I made these backgrounds on my iPod Touch using various apps, and also made some on the computer. Clicking the link will bring you to Box.net which hosts the file. There are 44 backgrounds in all. They are free to use, but read the terms which are also located on my Box.net site.