The above post gave me an idea. Can linkify provide a code block tag/formatting? (not syntax highlighting, just showing a box around the code and possibly coloring it differently than the rest of the post.)
But something that wouldn't parse smileys like quote->end parenthesis "
Would show spaces as nonbreaking spaces so you can indent code. Would handle any pasted tabs as indentions. Ect...
I wouldn't even mind if it only worked in this thread. But it might be a nice feature when sharing code, or sharing bug fixes on this thread...