The website lists almost every university course in Australia. Students can opt to join a mailing list for a course, and will receive periodic updates about new buyers/sellers until their expiry preference.

I put it live yesterday, but now what do I do? How do I get people to use it? How do I promote it?

For version 1 (http://textbook-central.appspot.com/), I was giving out pamphlets, sticking flyers onto walls all over my university. I won't do that at the moment because there is a semester break until the end of the month and not many students are at university. So hmm.

It'd be great if you also give me some feedback as well.