[liberationtech] Recommended Software for Encrypted Blackberry Voice Calls

[cantona7 at hushmail.com]

Hi group,
I've been doing some stuff with a Human Rights NGO that conducts 
sensitive work in a few different places. We're looking to increase 
security our mobile phone voice calls (probably Blackberry to 
Blackberry) via one of the various AES 256 type packages 
commercially available on the web. Does anyone have any 
recommendations or thoughts on these? There seems to be a number of 
options. Anyone have any advice on prices aslo?

Regards,
C