This year we released Adhearsion 2.1 at ClueCon where we added support for FreeSWITCH. Adhearsion now boasts support for 3 VoIP engines (FreeSWITCH, Asterisk and Voxeo PRISM), allowing a degree of portability between them. We hope this will encourage some people who currently use Asterisk with Adhearsion to give FreeSWITCH a try instead.
For those who don't know, Adhearsion is a framework for developing voice applications, and it's written in Ruby. It connects over the network to one of the above mentioned engines and exercises third-party control over calls. It is great for writing voice applications integrated with other services such as databases, web APIs, message queues, etc. It is used for IVRs, Call Centre automation, data gathering tasks as well as enabling a whole slew of "Voice 2.0" type applications.
To learn more, check out
http://adhearsion.com, or fire me an email. Does anyone want to hear about Adhearsion on the conference call?