<p>jsMath would be awesome as it could allow dynamic previewing of mathematics in questions and answers.</p>

<p>As a stopgap measure, you can use a service that compiles markup, such as TeX, to an image and then link the image into your Question or Answer.  Here's a list of some such services taken from a blog post by my good friend Cameron <a href="http://cameron.bracken.bz/on-the-fly-latex" rel="nofollow">see his blog post</a> for side-by-side comparisons.</p>

<ul>
<li><p><strong><a href="http://www.codecogs.com/pages/forums/pagegen.php?id=1047" rel="nofollow">Codecogs</a>:</strong> Delivers GIF or PNG </p></li>
<li><p><strong><a href="http://www.forkosh.com/mathtex.html" rel="nofollow">mathTeX</a>:</strong> Delivers GIF or PNG</p></li>
<li><p><strong><a href="http://www.forkosh.com/mimetex.html" rel="nofollow">mimeTeX</a>:</strong> An older version of mathTeX</p></li>
<li><p><strong><a href="http://www.sitmo.com/latex/" rel="nofollow">Sitmo Equation Editor</a>:</strong> Delivers PNG, possibly others</p></li>
<li><p><strong><a href="http://mathtran.open.ac.uk/" rel="nofollow">mathTran</a>:</strong>  Delivers PNG, possibly others</p></li>
</ul>

<p>It seems StackExchange scrubs image links that pass script parameters- which is unfortunate as these services can't be used directly from a post.  However, you can download the generated image and rehost using a site like <a href="http://tinypic.com/" rel="nofollow">TinyPic</a>.</p>
