Ever been developing for Outlook? Then you have to know the security dialogs it puts up when you try do anything remotely security sensitive. Also, you've bound to run in to the limited capabilities of the Outlook OM, requiring you to resort to CDO or Exchange to perform the task you're after. No more! Outlook 2007 provides a consolidated OM, and a new way of handling security for your Outlook Add-ins.
Read up on the new Outlook features on MSDN:
Part 1
Part 2