When Apple announced their iAd advertising platform yesterday, it’s possible many excited iPhone users yawned a bit. What was this going to change? Well, the answer to that question is: a lot. Jobs himself explained why: right now, mobile advertising sucks. You either see a tiny text ad that gives very little information, or you see a large ad in an app that, once you click on it, takes you out of the application and into the browser, ruining the seamlessness of your experience. Worse, because ads are so terrible, the mobile market remains both massive and untapped; there are tens of millions of people…