Recently I said that a good logic blogger needs to learn something like MathML. Well ... I have just taken a first step in this direction: enable the MathML mode on this website.
Also, I have just recently found ASCIIMathML, thanks to a posting in Andrej Bauer's blog. This script allows you to write math formulas in a LaTeX-like notation. This takes away the burden of learning MathML.
If your browser cannot display MathML, then here is a suggestion (look at 'system requirements' section).