Let me start by saying:
It will turn into a tool for spammers. More information here:
http://www.apejet.org/aaron/blog/2010/06/06/vapurl-com-is-dead/
MIT License (see LICENSE.txt)
VapURL is designed to run on Google App Engine at vapurl.com. If you want to run your own copy, you'll probably want to port away from appengine and address the spam issues.