Thanks for the ant suggestion, that fixed the first problem, but now there are others. Mostly "package does not exist" errors (net.java.games.input) and "Cannot find symbol" errors (Class Component in org.lwjgl.input.JInputController).
Any suggestions? If I can get this to work, I'd like to stick it in a tarball and donate the native amd64 libs to you guys.
P.S. My java installation is Sun's JDK1.5.0_06