I have a stream of SG1/A that runs constantly in the background, just for noise. Recently it moved location and I had to spend a couple of weeks of waiting (for the search engines to re-index) and then applied my chaos fingers to re-find the stream, this time running over SSL, which is pretty sweet. "It's better than nothing."
I don't really watch it, I'm too busy doing other stuff, but it's just noise. What noise do you use when you just want background?