Yeah, IceFire is dead on.
I've got my TTT:EE DVD sitting on the shelf next to FOTR:EE. I haven't watched TTT yet, though. The weekend before my wife and I go to the theatre we've picked out (Stratcomm: Brier Creek. Newest cinema in the area, big screens, stadium seating and excellent chairs), we're going to watch FOTR on Friday night, TTT on Saturday night, and Sunday night we'll go see ROTK.
If I were a real geek, I'd get some of the 1day screening tickets from work and go spend an entire day watching all three extended movies back to back to back. I just can't sit for nine hours at a shot.