I have passed the Microsoft exam 70-235. Now I have bragging rights to Biztalk, having passed all 3 exams. :D
70-230: Designing and Implementing Solutions with Microsoft® BizTalk Server 2000, Enterprise Edition.
74-135: Developing EBiz Solutions Using Microsoft BizTalk Server 2004
70-235: TS: Developing Business Process and Integration Solutions using Microsoft® BizTalk® Server 2006