A 30-day window for review of Google’s $750 million acquisition of AdMob is now up and the FTC regulatory agency has decided to take a closer look at impact of the deal on nascent but rapidly evolving mobile advertising sector. “[…]when we announced the deal, we don’t see any regulatory issues with this deal, because rapidly growing mobile advertising space’s highly competitive with more than a dozen mobile ad networks.[…]we’ve been talking to U.S. Federal Trade Commission over past few weeks. This week we received what’s called a “second request,” which means that FTC is asking for more information so that they can continue to review the deal. While this means we won’t be closing right away, we’re confident that the FTC will conclude that the rapidly growing mobile advertising space will remain highly competitive after this deal closes. And we’ll be working closely and cooperatively with them as they continue their review,” writes Paul Feng.