Just discovered a new blog that aims to help "sailors, race officers, committee members, judges and umpires to get a better understanding of the Racing Rules of Sailing in general and of anything to do with protests." It's written by Jos Spijkerman who is an International Judge and International Umpire. He's only been posting for a couple of weeks but there's some excellent material up there already if rules are your thing.
Check out Racing Rules of Sailing - Look to Windward. (Yeah, I know today's post is in Dutch but most of the others are in English.)