Pending an official announcement from Google, Google Chrome for iOS now contains the previously announced voice improvements that lets you search the web without typing out a single letter. Covering the extra row of keys that used to present themselves as you typed, a floating bar replaces the previous voice button from the omnibox. Tapping it brings up a microphone where you can speak your query, and depending on the question, Google will read the answer back to you (for example, ask it what time it is in Italy). Just like Google Search, Chrome will read back the text to you as you speak, and the results feel nearly instant.
You can download Chrome for iOS from the App Store.