as you know, there are no windows server 2008 exams available yet. the first opportunity will be the transition exams for MCSA and MCSE on 2003--those exams will be live on October 29. If you are one of the many MCSA and MCSE on WIndows Server 2003 who want to take them right away, here is a reminder of what you can be doing now to prepare:
Here's where to find all of that. Other things to be doing... check out product sites and look around for pointers from people who are already ramping up.
<added Oct 15>The marketing team is wondering if anyone around here would be up for an on-camera discussion of the early readiness material for Server 2008... so if you have used any of that training and live in the area, send me a note and I'll pass your name along!