I expect to see pseudo code and maybe even HPL code on regular basis. I think syntax highlighting would be a great thing to have.
On Stackoverflow, code is highlighted nicely; the schema used is inferred from the respective question's tags. This won't work for us, I think, because we probably won't have tags for programming languages. Are there other ways?
And what about pseudo code? Should it just highlight common keywords or should we establish a certain style?