OK this seems like it should be really simple. I can't find the code though. Can anyone tell me what file I need to edit to completely remove the "Forum Legend" box from the main Forum page?

Yeah and the "Topic Legend" box too for that matter.

Well, there's a forum_legend.thtml in the forum's layout subdirectory. Try replacing it with an empty file (you can't just delete it).

bye, Dirk