When I saw that in the November 2007 MCP Flash, I started to panic a bit hehe.
Microsoft will be retiring 22 exams in March 2008. But upon checking the whole article, exams for the MCSD path are not yet due for retirememt. Most of the exams to be retired are those for Windows Server 2000, Windows NT 4.0, Exchange Server 2000, and a few other exams. It’s maybe because Microsoft already wants to encourage users to migrate to Windows Server 2003. Besides, they recently launched Windows Server 2008.
Check here for the complete list of exams that are due for retirement.