The TechNet Webcast: Microsoft Virtualization Best Practices for Exchange Server (Level 300)  might be of interest to you:

Virtualizing business critical applications delivers significant benefits, including cost savings, enhanced business continuity, and an agile and efficient management solution. In this webcast, we focus on virtualizing Microsoft Exchange Server using Microsoft solutions, we discuss the benefits of using Microsoft virtualization technologies instead of technologies from key competitors such as VMware, and we provide technical guidance and best practices for virtualizing Exchange Server in various production scenarios. We also discuss results from lab deployment tests.

You can register for the event here.