Via a brief blog post, Google has announced the availability of in-app billing for Android Market applications. The new feature will allow application makers to publish apps that can facilitate future payments via Google’s Checkout system. “In-app Billing gives you more ways to monetize your apps with try-and-buy, virtual goods, upgrades, and other billing models,” writes Google. “If you aren’t yet familiar with In-app Billing, we encourage you to learn more about it.” The company notes that several applications, including Tap Tap Revenge and WSOP3, are already utilizing the service. Developers interested in taking in-app payments can find detailed documentation here.