I went yesterday to the Microsoft (there is money for you, there is money for us) See The Difference Partner Roadshow. Among fun little novelties like "If no recent Service Packs or no Antivirus Then no (local) network", there was one remark about SBS: "Vista can not be installed on a SBS 2003 R2 domain with the wizards. Wait for the next version of SBS to see that problem solved." Has anyone tested Vista on SBS and knows more about it?
Apparently Microsoft favors a fast transition to Vista. At the same time SBS seems to have problems to keep up with the rest of the Microsoft offerings. The buy XP upgrade to Vista offer (Microsoft Technical Advantage or something alike) ends in april 2007, what gives me the impression to be caught between marketing and missing Service Packs.
Did I say that the Roadshow free snacks where excellent.
However, Sean Daniel has put together a pretty good how-to for connecting Vista to an SBS domain:
http://seanda.blogspot.com/2006/08/looking-to-run-vista-rc1-on-sbs-2003.html
It hasn't really changed since RC1 as far as I know. Also, just because the offer ends in April does not mean that it won't be extended for Small Business if it's not possible to connect them correctly. Also, if you sold your clients the Small Business Desktop SKU instead, which has Software Advantage, then you wouldn't need to worry about the deadlines. (great article on this: http://www.orlandoitpro.com/newsletter10092005.asp)
Jeff
TechSoEasy