There's a couple of new useful FAQ's that have been released for the UK audience, aimed to answer some of the common questions that you have around licensing. Both the licensing and response management teams are committed to keeping this information fresh and relevant, so check back regularly with your questions, and if you have any, fire them through to the team!
You can access the relevant sites here:
There are questions around Vista downgrade rights, Office 2007 through Terminal Services and more. Useful stuff I'd say! :-)
You can also visit the Licensing homepage here.