What's a secure way to message/talk to someone in CM9?
I found the following but I don't think this is a definitive answer though it looks close to what I need, secure end-to-end encryption with no chance of snooping/sniffing/MITM.

http://en.wikipedia.org/wiki/Off-the-Record_Messaging#Phone_apps

I wasn't fully aware of OTR though I had heard the term used elsewhere but didn't know the full implications. I think OTR is what I'm looking for. 

Still looking for further input though.