Ask YC: Good distance graduate certificate/masters programs in C.S.?

I'm going to be working full-time next year and I'm looking for a way to continue my CS education by doing something like a graduate certificate or part-time distance masters. I'm going to be in the states [namely Seattle,WA] , but as an alien (meaning wildly varying tuition). I'm wondering: What are some good schools with distance graduate-certificate or masters programs in C.S.? Also what are the type of undergrad marks/ GRE scores required for most programs? Are there other tests besides the GRE I should look into doing for international distance programs?