We've been hearing that SP1 has been nearly ready for release for quite a while now, so when can we expect to see it? Perhaps in a few weeks.
“Through its public relations agency today, Microsoft declined to comment on the Feb. 15 date beyond reiterating the software would be available in the first quarter. Still, several sources who work closely with Microsoft said a mid-February release is not unlikely, and they expect the software to be out before the end of March.”
Microsoft might end up with a lot of returning corporate and government customers if Vista SP1 ends up being extremely stable and secure.