One more thing about numbers in general: The Swan orientation video mentioned that a new group would arrive every 540 days. Somewhere I heard (I think the podcast) that every season represents 90 days on the island.

Big surprise at the end of Season 6?

I'm new to the show, did Desmond or Kelvin ever mention how long they were in the hatch? Anyone know if the producers have placed an official limit on how long the series will go on?