Passed the BizTalk 74-135 certification
Randal and I have passed the BizTalk Server partner exam (74-135) "Developing E-Business Solutions Using Microsoft BizTalk Server 2004". It, as many have commented, was a rather difficult exam that has no real preparation materials to help get thru it.
For anyone interested in taking the exam it's recommeneded that you have lots of hands on experience with BizTalk.
Please note, this exam is designed for Microsoft Certified Partners, so unless you work for such a company the exam is not available.