Personal computers have been able to synthesize speech for decades; if memory serves, one of the ways to show off the earliest Macs was to type a few words into a program and play them back through the Mac’s speaker. So it’s a bit surprising that Type n Talk, a one-trick pony from Jirbo that enables you to … type in a word or phrase and listen to a synthesized voice speak it back to you is one of the App Store’s biggest hits at the moment.