Well Mad, there was obviously something going on with that as the Island was masked, and could be detected, but not visibly seen from the outside world and the fact Desmond couldn't leave on the boat back in the Season 2 finale.

I think it was kind of lame to do the time travel that way again. I thought it was cooler to have that only happen when Des turned the key. Also, it was kind of cool with his ability to see the future.

I thought it was a good episode. I think the next two before the hiatus are going to be excellent.