Hacker News Reader

https://heml.is/ should be on the way. I've been keeping on eye on it. It'll be interesting what the security community thinks of it after release.

There is also TextSecure (https://whispersystems.org/), but it requires text messaging.

Definitely holding off until the open source release (and hopefully it won't just be dumps of old versions like Silent Circle's.)

Agree that TextSecure and Redphone are great tools, albeit in different categories, and as far as I can tell their implementations are sound.