Unfortunately the College Board changed the information architecture scheme on their website a couple of years ago so the URLs from my class notes no longer resolve.

There is one study that shows there is a correlation between SAT score and college GPA, but only for students whose HS GPA is above a 4.0. In general though the test doesn't really have any validity.

Here is a link to the studies the College Board is promoting:

http://professionals.collegeboard.com/data-reports-research/...

EDIT: http://www.fairtest.org/facts/satvalidity.html