Check it out! Client Deployment guru (and former Doc Team leader) Becky has put together a guide to help you join a Vista RC1 client to a Windows SBS 2003 network.
It is conveniently posted to Sean Daniel's blog for your enjoyment!
And while you're perusing the latest and greatest, don't forget to stop by the
Official SBS blog for more tasty tidbits!
This posting is provided "AS IS" with no warranties, and confers no rights.