The best online university/course websites I can use as a benchmark for ours?

I'm in charge of creating a website for a new online degree program at Clemson University. Do you know of any online university websites (not University of Phoenix!)or other online course websites that I can benchmark our website to?<p>Even though our website is for an online degree program in Manufacturing Engineering, I wanted to benchmark it to any online program out there. Basically I wanted to compare the features, performance and other usability parameters.