Ask HN: Anybody working on a good math editor for the web (or would like to)?

I was trying to put up a few equations from a course I was doing, on my personal blog and I was curious about how people normally put up equations on the web. More importantly how the content -> presentation workflow works? Some solutions I have encountered are:

1. Do it in latex, generate PDF, copy image and paste or save as URL and link URL to an img tag. 2. Use some GUI (standalone or web) app to write latex/mathml etc as equations, generate the layout, save as image, copy and ..... 3. Have custom plugins on a custom installation of <your favorite blogging platform>.

Can this be done better and in a less painful way? I can see this may not be such a hot market, but was curious to see if anybody is working on this in an interesting way.

One idea that comes to mind is if the copy-and-paste aspect can be gotten rid of by say the equations/math-document being hosted as a resource at some REST endpoint and a PNG representation is served on a GET (if .png is the format selected). Similarly an /edit would take you to the "editor page" of the equation. (2) above would still be required but (1) and (3) are taken care of.

Thoughts?