Google released an update to its free search app that includes much better voice searching. It offers a challenge to Siri in terms of speed and search capability, although there are points of comparison and there are differences as well.
First, I have to say, Google Voice Search is fast. Very fast. You see your query in real time as your are speaking it. Conversely, Apple's Siri often takes several seconds to reply to a query and, in my experience, often misses what I've said. Google Voice Search never did this in my testing.
Here's an example. I asked Siri for the latest news on Hurricane Sandy. It replied by offering to search the web for news about Hurricane