I say...
TAR7 Leg 3 roadblock (eat four pounds of a traditional Argentinian feast)
TAR12 memory task
TAR16 Leg 5 detour (pigeon & morse code) + u-turn
TAR17 Leg 1 roadblock (watermelons)
TAR20 Leg 3 detour (harp & watermelons) and roadblock (bottle dance)
TAR20 Leg 9 roadblock (Bollywood dancing)
TAR22 Leg 1 2nd roadblock (sandcastles)
TAR22 Leg 7 detour (brains & brawn)
I'm pretty sure about the watermelon roadblock.
btw, is this a speculation thread or a wishlist?