From a personal productivity perspective (say that three times fast

), I would have to go with:
1) Pocket Informant (a real shocker, I know)
2) Plaxo mobile client (dude, it's free! and it backs up most of my PIM data via EVDO)
3) Microsoft Voice Command (this SO needs to become a native part of the operating system)
and for my bonus app:
4) Microsoft Live Search (again, free and it allows for voice input for tracking down all sorts of information)
Thanks again for hosting this giveaway and Happy Birthday to PPCT!,
Spencer