Now (From 29th December 2005) I am a Microsoft Certified Solution Developer (MCSD) in .net track.
List of all certification tracks - http://www.microsoft.com/learning/mcp/certifications.asp
Before you begin
1. MCP Exam prep and study tips -http://www.examcram2.com/content/downloads/Study_Tips_0789728230.pdf
2. 5 Rules of microsoft exams - http://www.petri.co.il/studying_tips.htm
3. Avoid surprises: Get to know new MCP exam question types
Microsoft-oriented prep sites
Other resources for MCPs