NYTimes.com - Nadim Kobeissi, Creator of a Secure Chat Program, Has Freedom in Mind
The New York Times reports: This group was building a project called Cryptocat, which has a simple, countercultural goal: people should be able to talk on the Internet without being subjected to commercial or government surveillance [...] Cryptocat and a few other services disguise the content of chat messages so that they look like gibberish to anyone who does not have the encryption key."

Comment: This looks like a tool that might come in handy for missionaries working in repressive countries. You can download Cryptocat here.