We may joke about this, but after going through the tutorial, and going live, I can say that the Vista's Voice Recognition is still not ready for live.
My favorite problem with Vista's Voice Rec, is that the commands are not recognised most of the time. Also, I should be able to see the words that have been imprinted, especially the commands, so I can re-record my voice print on them.
Just wait until I play with IBM's Via Voice, now produced by Nuance, the makers of Dragon Naturally Speaking.