I am using a MB Pro, a Blackberry Curve, Entourage and Exchange. Email, calendar and contacts synch wirelessly in a manner identical to Outlook. Tasks do NOT synch wirelessly -- you need a hard connection and to use the Missing Synch for Blackberry. Because of this, I have stopped using tasks on my blackberry and rely on my MB Pro and Things (a mac-based GTD application) to manage tasks.

In general, the Entourage and Exchange solution is virtually identical to the Outlook and Exchange experience. Plus, no spyware or viruses, of course....