Twitter Front End is a new look at Twitter.com and the web interface powering the message service’s social interactions today.
This website was built by Niall Kennedy using web standards best practices and optimized code design. Twitter FE is currently a read-only clone of the Twitter.com website rewritten for external development and rapid iteration.
Twitter FE is written in Python on Google App Engine. A few sprinkles of YUI JavaScript help delegate load times.

Go to Niall Kennedy’s post to read more details, or directly go to TwitterFE.