The Washington Times' Mark Kellner loved Mac Office 2004!  He especially enjoyed Entourage, highlighting the Project Center, three column view, junk mail filtering, and archiving:

Another new feature is archiving, which lets you save all your PIM dates in one file. It will be interesting to see if this file can then be imported into Outlook, but for Mac-only users, being able to create and save a periodic Entourage backup can come in handy.

While Entourage 2004 will not support direct importing of archives into Outlook it wouldn't be very difficult to write a simple .NET app to import the data.  More on that later...