I've been using the beta for quite a while. I haven't used it extensively, but I will probably use it more once it takes off. Early on in the beta process I req

I've been using the beta for quite a while. I haven't used it extensively, but I will probably use it more once it takes off. Early on in the beta process I requested Mathjax support. They added it, and now all you have to do to insert an equation is type a double dollar sign (ie, $$). That's sort of a killer feature, because most of my communications will involve equations at some point.