What are some good online resources for studying physics?

I'm preparing for the AP physics exams, but here's the twist: I'm not taking the class. Everything I've been doing to prepare for this test has been independent, and I need all the resources available to me. I've been in the library and been through a couple books, and I've been on collegeboard.org, but that's about it. Are there web sites and/or online resources that can help me prepare?

I'm currently enrolled in Calculus 2, to give a bit of info on my math background.

For my science background... I've gone all the way through the highest level of physics my high school has to offer, but that only adds up to about 3/4 of the stuff on the Physics B exam. I'm pretty proficient in chemistry, but I doubt that matters much for AP physics.