The speech team finally signed off on Vista, which means after exhaustive testing we don't know of any issues that stand in the way of our users productively using speech. Of course, we're one of many teams, so this doesn't mean Vista is ready to ship (yet) but we're extremely close. I'm running the latest bits on my Toshiba Tablet M200 and it sings: it's amazing what kind of things you can still do even on a relatively old (2 1/2 yr old) laptop. Besides speech recognition (of course) I have the new graphic drivers and the wonderful aero interface.
I was almost going to say "we're done with Vista" and then I caught myself because of course we're not really done. We're already working on lots of other cool ideas that we can't wait to show you.