I thought it would be useful to share a few answers to some common (but thankfully straightforward) questions:
Q: Where do I start?
A: Your first port of call is http://www.microsoft.com/windowsvista
Q: What features are in what version?
Q: Will my machine run Vista?
A: You can check using this tool http://www.microsoft.com/windowsvista/getready/upgradeadvisor/default.mspx
Q: Where can I find the minimum hardware requirements for Vista?
Q: What is the build number of Vista beta 2?