It's been a long time since I have looked at certifications. The last tests I took were for my VB6 based MCSD and SQL 2000. Recently, a customer asked me for advice about getting the MCPD certification. Since it's been a while, I surfed around a bit and found the following links that might be helpful:
Microsoft Certified Professional Developer (MCPD)
Prepare for an Exam
I've been told by one of my teammates, specifically for the MCPD: Web Developer certification, that MCPD Self-Paced Training Kit (Exams 70-536, 70-528, 70-547): Microsoft .NET Framework Web Developer Core Requirements is pretty good.