For only one more exam, it's worth it. It will look good on your resume/cv.
I would say that it's clearly worth it if you don't have the word "security" currently in a title in your resume.
M$ currently has a student discount for their cert exams at $60US each (reduced from $125US), and you can retake a failed exam for free. This offer is good through Jan 31, 2005.http://www.prometric.com/Microsoft/MSAATP/default.htmhttp://www.pearsonvue.com/ms/aatc/