Google releases App Engine
Google Apps Engine was released Google Apps Engine lets users to run Web based Apps on Google’s architecture! Yes, you heard it rite, Google’s Architecture. The Apps Engine is built on Python and you can host them on a free domain ending with “appspot.com” just like blogspot, if you would like to have your own domain name, you can also get one thru the Google Apps and share it 
Benefits
Intially, It is free! Once you manage to get an account, you initially get 500MB Space which is backed up on Google Server and which claims to provide bandwith for upto 5 Million Page Views.
Developing and deploying an application on Google App Engine
Download
Documentation
Google App Engine has already well documented. If you are interested to create an app, you can read the documentation here.
Sample Apps
PS: If you’d like to sign in to Google App Engine with your Google Apps account, use the following URL: http://appengine.google.com/a/<YOURDOMAIN.COM>/
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Hey, I just posted about what it was like to develop ToDone over the past couple of weeks, with some of my thoughts on what Google App Engine is like to work with from a developer’s perspective. I thought you might be interested - the post is here: http://scottyallen.com/archives/2008/04/08/behind-the-scenes-developing-a-google-app-engine-demo/
thanks for the post.. will check it and will keep visiting your Blog.. Be in touch and keep visiting