I really like the Super Ninja Search Options.
What would make search even better would be support for
hascode:1, which would find all posts that contain "code sample" markup.
Even though this isn't really code, it would be returned since I formatted it with the curly brackets.
Posts containing only bits of code marked up in-line
like this probably shouldn't be returned.
If SE provided this capability it would be easier to treat gis.SE as a code library, as requested here.