I read with interest the previosu stories about large oganisations banning Vista deployments, wondering if this was anything but normal policy.  Then this story broke where NIST in the US "were irked" at suggestions that the ban was in anyway but normal practice until they finish testing 

Explaining a Vista ban

The National Institute of Standards and Technology has put a moratorium on using Windows Vista, but that's business as usual, says agency's CIO.

newsmaker The prestigious National Institute of Standards and Technology has put a ban on Windows Vista, but that's standard procedure, according to NIST's chief information officer.

NIST, which does research and sets standards for things like cryptography for government use, is among several federal agencies that have put a moratorium on the use of Vista. The agencies are taking some time to make sure that the new Microsoft operating system meets their needs.

It is not unusual that large organizations aren't rushing to install major software updates. These organizations tend to do a lot of testing before upgrading. The same happened when Microsoft released Windows XP, and again with Service Pack 2 for Windows XP. Microsoft widely released Vista in late January.

Simon Szykman, chief information officer at NIST, was slightly irked by some of the media reports on his agency's move, which painted the ban as a major slap in Microsoft's face. In fact, Szykman said, this is business as usual. Ultimately, NIST expects many of its PCs will run Vista. Still, Microsoft has predicted a swift adoption of Vista by businesses.

Source: Explaining a Vista ban | Newsmakers | CNET News.com

ttfn

David