I have the iPhone version of this on my iPhone. It's a great app. The voice search is awesome. Very accurate because I think they send the voice file down to their server in California and analyze it there, comparing it to millions of other voice searches. It's astounding how bang on it it. I have put this app on my home screen and use it for almost all my searches. It also has the Google411 which is a (free) voice-controlled number lookup service.
I assume that the iPad has a microphone so these services would work.