If you really want a series of head scratcher scenarios I recommend <http://rrsstudy.blogspot.com/>.

I was at a seminar from that guy's blog a few weeks ago, he really knows his stuff.

Another great way to learn more about rules is http://www.sailx.com/ , its a sailing game but also has a very active protest room.
You learn a lot about rules when you actually have to defend yourself in the room.
Just reading through the protests is interesting: http://www.sailx.com/protests/protest-room