physics.SE has this nice feature that allows you to enter LaTeX code (formulas) in questions and answers, and then renders it using MathJax. e.g. you enter $x^2$ and it turns it into something like ...
When posting a comment, one is limited to 500 characters. These include the link target addresses, which can be pretty long. I believe that the intention of the restriction is to make the comment at ...
An emphasis gobbles the following space (or does not add some needed additional space), text *text* text <em>text</em> text becomes text text text text text (I can't use \␣ ...
Currently the dialogue of TeXtalk is formatted by <strong> for the speaker and <p> to separate lines. Here is an example from the interview with Yiannis Lazarides: This format may be ...