Inspired by my former background at twitter (a pale gray background with slightly darker gray stripes and gray cats), I've created my own tileable graphic in GIMP. I've posted it to my twitter feed and, frankly, I love the way it looks. I used the colors and the cat of my personal logo (along with another cat from that
particular font), staggered them, and put them on a striped background.
Yeah, I'm sure this is beginner stuff for some of you but... ;)