Not sure if you intended for this thread to become a list for everyone, but what the hell. I've had my 4.8is for just over two years as well. From 50k to almost 80k now. I should knock on wood as my list is fairly short, but I'm coming up on some key items (valve cover gaskets, plugs, belts, etc.). Just before the factory warranty was up, the PO had his dealer go through the air ride system and replace a few finicky items so I've been lucky in that arena.

-Both front air struts replaced with Arnott units
-Power Steering hoses (being done right now)
-Front Control Arm bushings
-Battery (although that was a mess in itself, lol)