So far I've spent 4-5 days trying to get issues with importing resolved.  Inch by inch I've succeeded in getting Contacts, Email, Tasks and Notes into Outlook and getting rid of the duplicate entries.  Calendar items are a whole different issue - I now have two calendars:  the default "Calendar" created by Outlook and my "Imported Calendar" from Entourage.  I've read through several posts on how to get the Entourage Calendar into Outlook but NONE that I've seen have actually resolved the problem (at least not that I can find - and I could certainly be missing something).