How to create a background like Dribbble.com?

I'm curious about the background of http://dribbble.com/ . I've seen something similar on a couple of other sites too.

What's it called?

How can I create something like with a different color?

Thanks for any pointers. I'm a non-designer trying to learn some design.

Answer

Both header and body part having gradient and inner shadow with some amount of noise. Play with sliders and you'll get the same result. I tried a bit just to show you; change values according to your needs...