outlook
Not to beat a dead horse on the whole virtualization and Outlook on a Mac topic, but I was pleasantly surprised to stumble across an article on Businessweek.com from yesterday that talks about the same issues I wrote about in my switch to using Outlook on the Mac.
I have been using Microsoft Entourage 2008 as the email client on my Mac for almost a year now and while it is not perfect, it provides the best Microsoft Exchange support out-of-the-box of any native Mac email application. That said, about two weeks ago I had to abandon ship on Entourage. I suffered a major Entourage meltdown, and it frustrated me enough that I made a hard switch over to nothing other than Microsoft Outlook.