Progress Update
I did some more testing with Wedge over the weekend and he seemed suitably happy with what we've got so far. There are a bunch of things to clean up and a few suggestions from Wedge to implement but then we're going to be into early beta which will focus primarily on server load testing and usability testing.
Wedge has written a very nice article on how to use the Trac system (which I mentioned earlier we'd be using for bug tracking for v4) which will be made available to testers.