I sometimes help out with LEED AP study classes, and lately I've been fielding a lot of questions about when the current LEED exam will end. (ANSWER - I'm not sure, but my guess from the LEED-EB process is that it will be at least a few months after LEED 2009 is implemented before they update the test tracks. I'd say but cannot guarantee that you'd probably still be able to take the current NC and CI exams at least through the first quarter of 2009.) While searching for an answer, I happened to notice a small paragraph mentioning a call for beta testers of the new LEED-EB Operations and Maintenance test:
If you register for an exam, but do not schedule an appointment, or if you cancel your scheduled exam appointment, you will have the option to participate in the Beta testing of the new EBOM exam for free. Beta testing will occur in November, 2008. Although specific details will follow, please know now that if you participate in the Beta testing event, it will take several months to receive your pass or fail notification. If you are interested in this option, please contact GBCI at email@example.com.
As far as I can tell this is still open, and of course you're currently limited to LEED-EB, but with LEED 2009 on the horizon I think it's reasonable to assume a similar testing track will be available as the LEED-NC and LEED-CI exams get reworked.
Waiting a few months for your results could be tough but is likely worth a $300-$400 savings for many people. Worst case scenario you take the test later at regular cost. I'll keep my eyes peeled for more info on this subject and will be sure to post about any updates... If you see something I missed please let everyone know by leaving a comment!