Last night was exciting as we got another build of WHS to play with. Since I had no data on the box from the previous version, I just did a "blow everything away" install. Nothing exciting to report in this regard, other than it rebooted many times along the way. After the OS installed, it took awhile longer to download/install the motherboard/ethernet/video/cool'n'quiet drivers.
On a very cool note, Lorenzo pointed out (via a comment) that using the "Portable/Laptop" power scheme is one way to let the AMD cool'n'quiet system do its magic. I'd been going nuts looking for a "Minimal Power Management" scheme, which is what most doc on the web says to use, but which wasn't an option on my box. Once set to Portable/Laptop power mode, I could see that the CPU speed was indeed adjusting to the load.
The client software install on both XP and Vista machines was very simple. Just drop the CD in, type in the server admin password prompted, and you're off to the races. The end result is an icon in the notification tray area. From right clicking on it, I could get to the shared folders, connect to the server console, and initiate a backup. The server console viewed on a client machine looks exactly like the console on the server.
To try out the file throughput, I copied my photos (27+ GB) from my desktop to the shared folder. Watching CPU usage on the server box, I could see a small load ( < 20%) from the process that migrates files to the duplicated storage volumes. As an experiment to see if I could make the file transfer any faster, I temporarily disabled my real-time antivirus scanner. Almost immediately, the server console "Network Health" status changed to "Critical". Clicking on the icon brought up a window that identifed exactly the issue (e.g., no antivirus software on machine 'X'). Pretty cool!
As I was playing with all this, I saw a little balloon pop up telling me that an automatic backup was about to begin. At this point, it was getting way past my bedtime so I left the machine to do its thing.