Virtual PC 2007
Link to Microsoft Virtual PC 2007
VAMT - a tool for doing proxy MAK activation and analyzing groups of machines for VA status.
Volume Activation Management Tool (VAMT)
Finally, these were online last week but not officially announced until today. KMS for 2003 and the MP for KMS.
Key Management Service (KMS) for Windows 2003
KMS Management Pack for Management Operations Manager 2005