U.S. News and World Report has their grad school rankings out with the best graduate schools, though you'll have to subscribe to get the premium content. There is also some information you can access without subscribing.

They also have a listing of 260 online graduate school programs, though some of those are also covered here if you browse the side bars.

And for those who need to brush up on their online learning lingo, they also have a directory of definitions.

Another interesting stop at U.S. News and World Report is the testimonials by students of online learning and distance education. Check it out, it may help you focus your ideas on if online education is for you or not.