The biggest weakness of this kind of app is it still exposes lots of interesting data for traffic analysis. It's a huge improvement over what we have today, bu

The biggest weakness of this kind of app is it still exposes lots of interesting data for traffic analysis. It's a huge improvement over what we have today, but I'd really like something where you can't see who is talking with whom (when, how frequently, etc.), as well as can't read the content. Unfortunately doing this with mobile is really hard, due to bandwidth and power. agl's Pond is probably the best effort in the space so far.