Google App Engine is a development and hosting platform that allows developers to host web-based applications on Google's infrastructure. Google App Engine is currently available as a limited preview release.
Editions impacted:
Standard, Premier, Education, and Partner Editions
Languages impacted:
US English
How to access what's new:
Sign up for the preview release at http://appengine.google.com/a/your-domain.com. Be sure to replace 'your-domain.com' with your actual domain name.
For more information:
http://google.com/support/a/bin/answer.py?answer=91077