If you’re reading this, you probably have an Apple ID. And that means you can now open an account with iAd Workbench. You, too, can be a digital Mad Man! Before today, you had to be a registered mobile app developer to take advantage of Apple’s iAds. By lowering the barrier to entry, Apple falls more in line with the likes of Facebook and more recently Twitter in competing for advertising dollars. Only question now is what do you have to sell?