It looks like online colleges are a hot niche in SEO for 2010. These for-profit colleges like Kaplan and the University of Phoenix need to keep churning out 1000s of new students each month and so happily pay fat referral fees. This can lead to some scandals as they push too hard. But as the mortgage business collapsed and left a lot of affiliates with less revenue, it looks as if education might step up to fill the gap. One such site is bestcollegesonline.net which covers online colleges and universities. Expect many more to follow.