Mobile advertising as you’ve likely heard, is hott right now. (With two “t’s”, yes.) According to comScore, mobile advertising spend is projected to hit $2.5 billion by 2014, with $2.7 billion projected in mobile ad revenues for this year and $6.6 billion by 2016.What’s more, in August, 84.5 million people in the U.S. owned smartphones, and that number continues to grow…