Instead (or in addition) to having TeX markup eventually, we could also have a little LaTeX/TeX sand box apear on every page (possibly with a way to hide it) in similar style to LaTeXit! on mac. This would allow people who do not have a working solution to try out a small bit of LaTeX without going the trouble of creating a temporary file on their computer, figuring out the preamble and then remove said files...it would also help in writing answers for same reason, you think you know what you want to write, plop it in the box, hit a button (or not!) and see immediately if the result is to your liking.
By the way, if I understand correctly, for someone with power to make this happen, this idea had better be popular...please vote up or down accordingly.
To make this post go somewhere, I would like to suggest that people list here posts that would benefit from a good solution to this problem. It already is CW, and I'll start it off:
- drawing arrow heads without the tails in tikz
- difference between big and bigl
- ... almost any question/answer so far that required an image to be included.