Hooray!
I got my invite to beta test Windows Home Server Beta 2 today and have just downloaded and burned the 3 disks that make up the package. I've already reported a documentation error to the Microsoft Connect Feedback site and now I've got to save my wife's email off the spare machine that I'm going to press into service as a home server.
I really think I'm going to need some more disk...
Cheers,
Neale