This is it. In-app purchases are available to apps and developers that activate them. Several apps will start off with this functionality, including Tap Tap Revenge 4, which launches for the first time on the Android Market, along with more games with lesser-known statuses. What does this mean, and how does it apply to you? Well, if you wanted to beat a certain level in a game, or acquire something of a nature which isn’t actually available to you, an in-app purchase can change that by charging your credit card (for the amount seen, in-app), and you get the show on the road, immediately. Check out the official Android Developers post for a full list of games using the new feature.