Just a quick heads up, the public beta begins soon. So get over to Connect and sign up for it. If you don't know what Windows Home Server Power Pack 1 read this.
You will have to wait for the program to start, meanwhile set up your newsgroup access (tut on Connect). Once it does start, it will be mostly likely distributed via download.
Don't forget to do a full backup before trying it guys.
I am sure something WILL go wrong, it is just a case of whether you are one of the "lucky" ones...