University of Virginia does this, too, although they often just work under the professor that teaches the class. It's a great experience, all told, since you get really fluent in the class material, and great at debugging if you're in a lower class where the TAs help with that. The pay is comparable to most other on campus jobs, but it's much more engaging than working a gym desk.

However, even that hasn't completely met the needs of the current enrollment deluge: I'm glad I got my requirements out of the way early on, because there are an absurd number of CS enrollments. They recently capped one of the major tracks (the BA) because there were simply too many students.

Edit: Undergraduate at UVA. Also, I think undergrads are possibly a better option than grad students: since we have actually taken the course, unlike most grad students.