Meta-notices for this:

(just for me to keep track)


 - http://meta.physics.stackexchange.com/questions/1233/math-and-si-formatting-buttons
 - http://meta.chemistry.stackexchange.com/questions/70/mathjax-formatting-buttons-for-you
 - http://meta.math.stackexchange.com/questions/4111/mathjax-formatting-buttons-for-you-guys
 - https://electronics.meta.stackexchange.com/questions/1106/mathjax-hotkeys-script-for-chrome-and-firefoxgreasemonkey (Slightly crazy, but nice)
 - https://quant.meta.stackexchange.com/questions/297/mathjax-hotkeys-for-chome-and-firefox
 - https://dsp.meta.stackexchange.com/questions/176/mathjax-buttons-hotkeys-script
 - http://meta.cogsci.stackexchange.com/q/306/701
 - https://cstheory.meta.stackexchange.com/q/1521/9327
 - http://meta.cs.stackexchange.com/q/334/1400
 - http://meta.scicomp.stackexchange.com/questions/285/mathjax-buttons-hotkeys-script
 - http://meta.mathematica.stackexchange.com/questions/389/mathjax-buttons-hotkeys-script