I just ran across this web site: Library of Theology. They have quite a bit of good information relating to the Calvinist / Arminian debate. There are lots of video and audio links.
Much of the content is not classical Arminian (ie open theism, moral government, rejection of original sin, etc). Still, it is a worthwhile resource.
I’ve listened to some of the audio, which is by a fellow named Kerrigan Skelly. He has a series arguing against the TULIP. He presents to a group of little kids, so he dumbs things down quite a bit. I found his explanation of moral government theory helpful. A good understanding of MGT has always eluded me. :)