What about using IM, its more cost effective. I know of software that was developed in Cape Town, SA. It (JammiX) is currently used by RLabs (http://www.rlabs.org/) offering Advice and support around around various social ills in South Africa ranging from substance abuse, stress, depression, suicide, rape to just mention a few. They already supporting over 250k ppk using this software. I know that the WHO will also be using the software soon. Check them out.