what os are you running? If you're on linux, make sure that you compile the kernel module for the Serial->USB board that they use, I don't think that it's included with most standard kernels. I don't think that you'll get one to work on the mac.
Edit - Also check out http://centerstageproject.com/ Maybe at some point they will include the LCD support themselves. Doesn't seem like they've made much progress at all lately though :-/