This is the real kicker for some applications.

After all, Knuth didn't write TeX because he needed a typography solution, he wrote it because he needed a typography solution for mathematics.

All these years later, and TeX (with or without LaTeX) is far and away the best solution I know of.

As for the mass market: Word's typesetting of mathematics is terrible, as is the interface (for anything but the simplest expressions). MathML is an interesting idea, but has a long way to go on the actual typesetting, as well as being much more painful to use than LaTeX...

I've read about "experimental partial MathJax support" or something like that in the changelog, but I haven't looked into it, yet.

It's actually one of the big questions I'm having, as well.

You can use MathJax inside Pollen today. As far as building more integrated support for math typesetting, I'd like to do that, but what I'm not sure about yet are the ergonomics. Ideally, you'd just be able to drop TeX-style math expressions into the markup, indicating whether they're inline or block, and Pollen would do the right thing in terms of handling the rendering (based on whether the output is a web page vs. something else).