Ok, so I got the lowdown on getting google wave accounts for our members. The wave team will enable a batch of accounts for us as long as we're willing to do a hackathon and whip together something that uses google wave (extension, gadget etc.).
API docs: http://code.google.com/apis/wave/guide.html
See samples here: http://wave-samples-gallery.appspot.com/
Sign up for a wave account here: https://services.google.com/fb/forms/wavesignup/
Anyone interested in writing some google wave code, just shoot me an email and I'll compile a list for the wave team. I'll need a volunteer to head the hackathon and decide on a project (we can discuss this on Wednesdays's GTUG).