I think TeX notation for maths is still very good, sometimes you just need that bulk to properly handle equations, though finding symbol keywords can be a pain.

I think TeX notation for maths is still very good, sometimes you just need that bulk to properly handle equations, though finding symbol keywords can be a pain. I recently released a web editor for Markdown/LaTeX mix (http://notepag.es/introduction http://notepag.es/introduction) using Showdown/Mathjax. Have found it very useful for quick technical docs (assignments at university primarily). Though it still needs some smoothing between markdown and tex.