The App Inventor Team informed us that…
“By the end of 2011 Google will be making the complete App Inventor source code publicly available under an open source license, so that anyone can study the code and modify it as they desire.
In order to ensure the future success of App Inventor, Google has funded the establishment of a Center for Mobile Learning at the MIT Media Lab. Sometime in the first quarter of 2012, the Center plans to provide an App Inventor service for general public access, similar to the one Google is currently running.
In order for you to continue working with your projects in an open source instance (MIT or otherwise) of App Inventor you will need to download your data from appinventorbeta.combefore December 31st and later upload them to an open source instance as it becomes available.
…is this good news or what..:-))