The more I think about it (and that's all I've been doing since I watched it), the more I think the guy in the casket is Michael. The obit said he was survived by a teenage son.
Which makes me think that Michael left the island and told other people how to get to the island and probably does some other bad stuff that he feels guilty about and he offs himself.
It's just my imagination...
I love this show
And yes, it's better than Jericho, my only other addiction. It's less schmaltzy than Jericho, but has the same mysterious qualities. *sigh* can I last until next season?