Nobody mentioned the more recent phenomenons in "stretching" the rules.

Older news, but "grooved" hulls, oozing polymers into the water in front of the boat.

Or most recently, TNZ's Hoola and the fact that they are all building masts to twist and mimic a rotating mast at the top. They're laying the fiber to allow for this and using the backstays to enhance it (since rotating masts are specifically prohibited). Don't forget a/b the new funny bow shapes that allow for LWL with less LOA.