I developed a pastebin for math last night. It is called
MathB.in. To use it, please visit: http://mathb.in/
As you can see in the footer of the page, LaTeX rendering is
powered by MathJax, so I thought this forum might be a good
place to let you know about it. For MathJax users, this could be
a useful place to try out LaTeX + HTML code snippets and see how
MathJax renders mathematical text on the browser. For others,
this could just be a pastebin for mathematical text.
I hope you find it useful. In case you have any suggestions,
please feel free to email me.