I think it'd be nice to find parrot chalices in runic chests, or a stack of the instant-CP-refunding potions. Add in the potions that change your size (and provide bonuses accordingly to Strength or Dexterity) would also be nice to see as a rare chest loot item in higher-end dungeons. Even the infinite water/alcohol/food items would be nice to have available to landbased dungeons. I'm not so sure about adding the +4 sail gear items to the landbased loot matrices, but maybe?
Right now, they're sailing-only. It blows their value out of proportion, and makes them only able to be reliably gathered by a minority of the server. While I understand having the +4 sail gear items limited to sail-only treasure chests, it'd be nice to see other items available to the rest of us.
This also would benefit sailors anyway, in the long run--as giving these items a chance to spawn in non-pirate chest loot matrices means that ships also have a chance to be more lucrative. Assuming that they are kept rare throughout, their value won't be decimated--especially since, outside of the parrot chalice and infinite water/alcohol/food items, these items are one-use and gone.