Mathjax and markdown¹.

Markdown

Markdown is enable for both posts and comments. It can be used like this:

Markdown
======
Markdown is enable for both posts _and_ comments. It can be used like this:

Recursion!

Mathjax

One thing I hate about commenting on facebook, twitter, and most blogs is the lack of latex or mathjax equations.
But behold, if/when you want to tell me my math is terrible, you can!

$p(\theta|y) = \frac{p(y|\theta)p(\theta)}{p(y)}$

produces:
$p(\theta|y) = \frac{p(y|\theta)p(\theta)}{p(y)}$

Displayed equations can just use two \$\$ on each side instead: $$p(\theta|y) = \frac{p(y|\theta)p(\theta)}{p(y)}$$