slowtreme, I don't see any "features" that where not already present in the previous version of Entourage.
If anything, 2004's impliementation of exchange support is much worse. Personally I have gone back to Outlook 2001 and my colleges have either rolled back to v.X, outlook web access or use a citrix/rdp server to access mail.
Falleron, Outlook web access might be your best way forward, assuming you have ssl activated.