As mentioned on this post, some exams of the Microsoft Certified Professional Developer certification, aka MCPD for .NET 3.5, are on beta. The new Windows Form exam (70-505) will have a beta version available for registration as of 11/21/2008. See the information at:
free (normal cost is 125 USD), and if you pass on it, the exam credit will be added to your transcript and you will not need to take the exam in its released form.
So hurry up, because seats are limited. First-come, first-serve!
For more information about beta certification exams, see Beta Exams Announcements Blog, and also Gerry O'Brien Blog.