hey guys,
check this out:
http://www.entourage.mvps.org/faq_topic/duplicates.html
I just used http://www.barryw.net/scripts/files/removeduplicates10.zip to good success on a test of 20 dups on Entourage 2008, and about to let it loose on 100's after updating to SP1 for Ofice 2008
P