Well, I think it could come in handy if you're driving (using some form of headset / earbuds, of course), or even if you're walking (especially for those of you in the city with busy sidewalks).If this thing is not as fast as it would take me to do a google search via the iphone web browser or via the google search app, then it would be only useful to blind people with brail iphones.
Actually, if it can translate good enough, it will just save us from having to type when we have long questions / search queries. Now, if they can just work out some of the entry options (not, and, plus, minus, quoted, etc...)