"No more setup for readers. No more browser plugins. No more font installations... It just works."Nice; the above tag-line is pretty much the exact opposite of MathML (ha!) Basically, they've got client-side LaTeX typesetting via JavaScript. I'm a big fan of LaTeX. A few years ago I started working on my own server-side LaTeX-on-the-web solution via JSP, but it was rather involved and a bit of a pain. MathJax seems to perform much better than my prototype system did, and has additional client-side niceties (dynamic scaling, cut and paste, etc.)

To get this up and running in a system like Blogger, one just sources a single script from MathJax' CDN in the blog template (see here for details). Then type LaTeX source in your blog posts; MathJax will scrape it and re-render it right in the client's browser. Here's a sample: \[ \int\limits_M{\partial\omega} = \int\limits_{\partial M}{\omega}. \]

There are a few niceties for poor suffering MathML users thrown in as well.