I missed "Lost" -- forgot. "What happened?

Answer 1

It'd take forever for me to recap, but I can give you two great sites where you can read good recaps (if you dont want to watch it).
The first is tvguide.com
http://community.tvguide.com/thread.jspa?threadID=800009475
direct link to the recap of the last episode.
The second is television without pity
http://www.televisionwithoutpity.com/articles/category_1197.html
direct link to the shows recap page.

Television Without Pity gives you a more indepth recap than Tvguide.com, but if you want a quick one Tvguide.com
hope this helps!

Answer 2

watch it on ABC.com