The average SAT score

The average SAT for all 2009 seniors is about 1517.

But the average SAT score for admitted students are higher than it.
For Ivy universities, the average SAT score is from 2100 to 2200.
For top private universities, the SAT average is about 2100
For top public universities, the SAT average is from 1800 to 2000.

For detail SAT scores vs. colleges, you may check the website: http://www.satscores.us
To see what score you might get on the SAT, go to SAT Score Prediction