These are my favorite
AP Computer Science A Related Links

College Board AP Central
The official word from the official source. You will find MBS materials here (if you look hard enough).
http://www.collegeboard.com/ap/

Chris Nevison, Colgate University
The Chief Reader of the AP Test. I prefer his "chn.util" for Java console I/O
http://cs.colgate.edu/APCS/Java/APCSJavaMaterials.html

Owen Astrachan, Duke University
A Former Chief Reader of the AP Test. Owen has 2002-2004 free response answers in Java
http://www.cs.duke.edu/csed/ap/

Alyce Brady, Kalamazoo College
Her MBS page is excellent, as it should be since she helped write MBS!
http://max.cs.kzoo.edu/AP/MBS/

Dave Wittry, Troy High School
Dave has *lots* of great AP related resources, especially for JCreator Users!
http://www.apcomputerscience.com/

ICT Curriculum Homepage
I've used the C++ ICT Curriculum (and now Java) with excellent results. I think it is a great starting point for teaching the AP.
http://www.ict.org/apcs.html

Karel J. Robot
An excellent way to begin an AP course, Karel introduces Object early, often, and well!
http://csis.pace.edu/~bergin/KarelJava2ed/Karel++JavaEdition.html