Here it is, folks: In-app billing for Android. The new service has gone live for Android Market titles, just as we heard it would last week. You can expect developers to begin deploying this means of monetization for things such as virtual goods, upgrades and expansions, and subscription billing models to name a few.

For those itching to spend some money, several titles launched in the Android Market today alongside the new in-app billing features. Tap Rap Revenge, Comics by ComiXology, Gun Bros, Deer Hunter Challenge HD, WSOP3, and Dungeon Defenders: FW Deluxe all feature some version of the service and are available for download onto your Android devices now.

[via Android Developers Blog]