Hopefully you've seen this announcement by now - if not take a look.  Personally I'm looking forward to the Green/Power calculations:

Source: MAP blog

Our team is pleased to announce that we are opening the Microsoft Assessment and Planning Toolkit 3.2 Beta Program for registration.

In this new release, we will offer an extended set of functionalities that will include:

1. SQL Server migration assessment - advanced features including instances inventory and SKU/version identification
2. Microsoft Online Services survey-assessments for onboarding/migration
3. Green IT/Power Management calculations
4. Server virtualization assessments including Host/Guest relationship inventory of existing physical/virtual environments

Please join the MAP Toolkit 3.2 Beta Program today.  We plan to release the beta downloads in October 2008.