If you like LOST, then check out this website. It's the best one I've found. The forum is good and I especially like the 'Investigations' section where they post screen caps of all kinds of stuff that you might have not caught as it was playing live...
http://lost.cubit.net/
I'll check it out... ecurbh has been checking out some sites and telling me about it :~)
I hadn't seen that one yet... got it bookmarked. I've mainly been reading at the LOST creative team's official site, The Fuselage...
http://www.thefuselage.com/Threaded/