Some links for SAT prep: (I've not yet tried this site out.) (This site is challenging and will prepare you for much of what the SAT will test you for, at least in English.)
Test Prep Review (I haven't reviewed this site.)
The Official SAT Test Prep Site (You must register with this site to use it.)
Official SAT Test Prep (You don't have to register with this site!)
Question of the Day (Part of SAT's test prep site. You do NOT have to register to use it.)
State of Maine SAT site (This site has a Webinar for students. I haven't seen the whole thing yet, but it looks interesting.)

Some student-created SAT quizzes in Pages:

Improve Your Vocab and Help Others While You're At It: