As you probably already noticed, we opened up several new areas on http://technet.microsoft.com for Windows Server 8. Be sure to spend some time in the evaluation resources area. There is a lot of good information there.
On the Overview tab you’ll see a couple of document links. If you are an IT Professional, you’ll likely want to download the Windows Server “8” Beta Evaluation Guide. Tons of great information in it. The product guides rock. Enjoy!