Once you get caught up with past episodes of "Lost", and start watching current episodes...

...here's a watcher-supported website using the "Wiki" format.

It's quite amazing; after last night's episode

http://www.lostpedia.com/wiki/The_Shape_of_Things_to_Come

, there was already several pages of text, cross-linked with past episodes, and opening up new links of WTF (e.g. http://www.lostpedia.com/wiki/The_rules)