I've felt for quite some time the rapture would happen around the same time of some natural disaster or possible terrorist attack.  Watching the news about the tsunami, people are in chaos and don't know how many people are missing.  this could be similar to what happens during the rapture and may take months for people to understand what happened.  Many events in the bible happened at the same time as an earthquake.  I think what we're seeing now could be a view of what is to come, only on a much smaller scale.