SAT vs IQ: 81% http://www.sciencedirect.com/science?_ob=ArticleURL&_udi...

I couldn't find information on correlation between IQ and college degrees, though. My Google-fu is weak.

Edit: a bunch more cool stuff (and sources) at http://en.wikipedia.org/wiki/Intelligence_quotient#Positive_...

"Two other factors, family in receipt of state benefit and IQ categorisation, also have significant predictive powers, but are somewhat less important than a deviant classification. Respondents with below average IQ are less likely than those with above average IQ to pursue third level education. Those groups in receipt of state benefit are more likely to leave the educational system without completing second level. However, those in receipt of state benefit with above average IQ present a similar pattern of educational attainment as those with a below average IQ but with families not in receipt of state benefit. This finding indicates that socio-economic advantage can benefit individuals educationally. A similar pattern is evident for both the deviant and non-deviant groups but the deviant group is less likely to complete second level and go on to third level education."