[traeblain]

This would mainly be used for posting to sites that allow images but not custom javascript. If you run your own site and can use MathJax, then you are fine but for others that cannot include the javascript (comments systems, social sites, etc.) this would be a nice alternative.

[dunham]

MathJax's HTML+CSS rendering looks much nicer than an image to me. I wish there was a way to run it on an HTML document in a batch fashion. (e.g. for generating an epub file)

[lrem]

Have you looked into pandoc?