LaTeX on Calculemus
Calculemus! is set up to display mathematical symbols using LaTeX, when viewed in Firefox* or IExplorer+MathML. (This is how I did it.) If you are contributing posts or comments here, just type your pretty LaTeX code between dollar-signs.
|Enter this:||To get this:|
It works in the posts and the comments as well, but in the comment-writing mode it will show just the code (see the post in full-view mode for the magic).
* For me it looks best when viewed in Firefox, with ClearType turned on.