We have an iPhone mini-trend on our hands: voice-controlled search. A couple of weeks ago, I wrote about Google’ clever Mobile App for the iPhone, which lets you perform Web and local searches by lifting the handset to your ear and talking. Today. Vlingo, the developers of a BlackBerry voice app, released a version for the iPhone. It’s both a direct competitor to Google’s offering and one that’s quite different in functionality, pros, and cons.

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