Google announced that in-app billing would be coming back at their Honeycomb event. Yesterday Google announced that the new feature would be going live next week, and that the system is already available for testing in the Android Market Developer Console. Any app that will be using in app billing can now be uploaded, as well as product catalogs can be created.
This is definitely something that has been missing on the Android platform, and hopefully this new feature will aid in the amount of growth in the number of apps and developers. If you are a developer that wants to take advantage of in-app billing head over to the Android Developers Blog to get all the information and documentation you will need.