Like many many others I am also excited about the Avalon CTP release for a number of reasons:
Up until this point only the very brave, installing Longhorn on a spare box and working entirely from the command line, have been able to provide us with feedback. I am hopeful that the CTP release, while still a bit unpolished and clearly not final, will be accessible enough that we will begin to hear more from the community.
How do you get it? It's available for download for MSDN subscribers (including Academic Alliance).