Windows Server 2008 MCTS exam release date is getting closer; we're looking at somewhere around March 10. As I said earlier, you can sign up to get an "exam live" notice from us when 70-640, 60-642, and 70-643 are available at Prometric. This might be more efficient than poking about wildly, wondering if you've missed it.
If you prefer, you may continue to poke about.
The MCITP exams (70-646 and 70-647) are looking like first week of April.
About your beta results... I do not have any insider information for you. But, as you know, we hope to get you your results before the live date. So if you took an MCTS exam, you've got a few weeks to relax before beginning you exam-results anticipatory-freak-out. If you took an MCITP exam, please be patient as your results will likely be a while.
At the study hall here at TechReady, lots of questions on the upgrade path from 2003 to 2008. Did you see that you can download a flyer (from the upgrade page) that has it all spelled out?