It's a really cool stuff that you are making guys.

I will definitely try to hook my s/w to it in a future.

Do you design it with a DoS prevention in mind?
That's definitely a must have, for a system like this - there will be a big money trying to break it.
Recently I was reading a bit about how darkcoin solved DoS problem for coin joining; they do it by taking a collateral from the coinjoin parties, so if any of them would back off he gets to pay for it. That's a smart DoS prevention idea, though I'm guessing people also came out with other solutions.
But going back to secured chats - they also need some DoS prevention, especially if the client code is in javascript.