Android only: Vlingo, a voice search/action app that's really good while driving, now offers an "Action Bar" that can pull off hotel searches, OpenTable reservations and movie ticket purchases. It also allows text input when it's not quite proper to speak.
What sets Vlingo apart from Google's own Voice Actions for Android? Vlingo offers a bit more flexibility in what you can say to it. "Find burritos in Buffalo," for instance, might come back with a restaurant search for Buffalo, NY, and "Where is Little Fockers playing Friday?" brings back movie results. And Vlingo can activate a lot of apps on your own phone, too, as well as start up in a very convenient driving mode that reads your texts and emails, and allows for responding by voice.
Vlingo's update is free for Android users, and should show up in the Market.