Indigo & Asterisk

I was wondering if anything cool can be done with Indigo & Asterisk and I run into this page. Very cool indeed.

http://scottstuff.net/blog/2007/08/15/lightweight-home-security-with-indigo-and-asterisk

Any similar hacking pages that integrates Indigo and Asterisk? I run my own PBX appliance based on Astlinux/Asterisk