Entourage is a very nice application, IMO. I am curious as to which is going to be easier to transfer over to my next Apple laptop. I'll be able to post my experiences with Entourage transfering pretty soon.
Now that I've got a GMail account, the idea of using a email client is becoming less appealing - especially if GMail can add very strong POP forwarding software and the ability to grab everything out of my Entourage app. It can't do this now - but perhaps soon.
I would just love it if GMail developed a client that seamlessly integrated with their web client. If it could sync during internet connections, this would be ideal. I can dream...