1. The computer lab where the Vaxen are... d'oh. These days, check freshmeat, the programming sub-reddit, and mailing lists for languages/projects of interest.
If you have an entrepreneur's club, I've seen couple hackers hangout at that club. It is easier to work with a hacker who is already looking to be an entrepreneur than someone who is doing a Masters and looking forward to making that nice salary after graduation--selling your vision to him is one hard task.