I went ahead and bought one of these myself on Sunday. Thanks for the heads up. They went fast - there were only 4 left (of the 1.83 GHz Xeon) after I bought mine... I noticed one of you (or perhaps somebody over at [H]ardforum) bought 3!
I wish this thing supported VT-d - it would open up a lot of with regards to running it as a VM server. I think Hyper-V is the only one (VM server) that supports disk pass through with out VT-d or the AMD equivalent. Just curious, anybody got their's supped up with a 6 core Opteron (or two) yet? According to Micrcosoft, WHS 2011 only supports a single CPU socket with up to 4 cores and 8 gigs of RAM. I know the single CPU socket and memory limitation has been confirmed, but my Google-fu is failing me on whether WHS 2011 is limited to 4 cores or could use all 6 (or more, depending on the CPU) on a CPU with more than 4 cores. Can somebody with a 6 core Opteron open up task manager and see if it's showing all 6 cores? Or 12 if you went the dual cpu route (this shouldn't work, but it would be a pleasant surprise if it did!).
I think one possible work around for dual CPU systems would be to run WHS 2011 as a guest in Hyper-V and create a vCPU and assign all 8/12 cores to it. I THINK WHS 2011 would see this as an 8(or 12) core CPU. This is/will be my first go around with virtualization technology (well, I did play around with Virtual box for a day or two once), so I'm not sure exactly what is all possible on this hardware. I'm thinking about getting a pair of low voltage Xeon quads and 16 gigs of RAM and finding out

I think I'm going to take the Tool Time approach. Even if you can't use more than 4 cores in WHS, there are quite a few other cool things I could think of doing with a VM server with dual quads. Assuming Hyper-V will still give good I/O performance with out VT-d - I still haven't figured that out either!
Those that already have a WHS 2011 server, what kinds of cool stuff are you guys doing with it beyond serving up Blu-rays and DVDs? I was thinking about getting a security cam (Logitech B700e, maybe) and a PoE router and running something like Blue Iris. Could covert my side door where all my packages are delivered and my drive way where I park my Jeep (sadly, no garage at this place). Maybe an instance of Torchlight 2 as a pseudo-dedicated server when it's released? Perhaps a Minecraft server as well? Just a couple of ideas I had.