I took a beta Exchange exam once…. It was a beast!
Exchange Server 2003 exams are being added to eventually replace the 70-224 and 70-225 exams for Exchange 2000 Server.
70-285 Designing a Microsoft Exchange Server 2003 Organization is being beta tested from January 16-22 for invited testers. This exam compliments 70-284 Implementing and Managing Microsoft Exchange Server 2003 (See the 70-284 Preparation Guide).
The learning never ends in this business.
Happy New Year.