do you mean webchat? that's a good option as well but to build something as simple and awesome as Magic, text messaging is the way to go
If I posted something I had poured my heart and soul into for months/years and had to deal with sarcastic vitriol from someone who completely misses the point of what I'm trying to accomplish, I wouldn't feel comfortable posting my work here. I'm personally very grateful there is a community like HN where negativity and closed-mindedness is grayed out.