I recently posted about Google's new mobile search app that recognizes voice queries. However, I had mixed success, and am going to try Vlingo — voice-powered software that Cnet says is better than Google's. CNet's review includes an impressive demo video of Vlingo in action. A version for iPhone was released (free!) last month. It lets you speak into your phone to search the Web, as well as dial contacts and update your status on Twitter and Facebook. Vlingo has the added benefit that you can pick which search engine to query. It returns search results to Safari.