The College Board just announced a change in its score reporting policy. In the past, a school received all of a student's SAT Scores. If you took the test 3 times, a college received all 3 scores. The new policy will allow test takers to select which SAT scores a college receives.
The shift in policy was intended to "reduce student stress and improve the test-day experience", according to the College Board. With the new policy, you would know going in that if you screwed up royally on the SAT, you could always take it again and the college would never see your poor score.
Some people worry that this new policy may help higher-income families disproportionately. They have the money to cover the cost of the multiple SAT exams. If you could afford to, you could keep on taking the SAT until you got a score that you liked and only show that score to colleges.
The policy does not kick in until the March 2009 test date. However, once it's in effect, it will apply retroactively, meaning you could choose to send your March 2009 score to a school and not your November 2008 score (even though the November 2008 test date was before the start date of the policy).
The new score reporting policy is "opt-in". You will need to actively choose this score reporting option or all of your test scores will be sent to colleges and universities.