Rigby's World of Egypt - Good general Egyptian site.
Tutankhamun: Anatomy of an Excavation - Done by the Griffith Institute in Oxford, England, good analysis of the excavation procedures of Howard Carter.
Webquest King Tutankhamun: Was it Murder? - Excellent school age exercise for teachers that puts the students on the trail of whether or not Tutankhamun was murdered.
National Geographic's At The Tomb of Tutankhamun
The Tutankhamun Exhibition - A museum in Dorchester, England has recreated the exhibit and has some informtion regarding the king.
TourEgypt.com - The Official Site of The Ministry of Tourism of Egypt and The Egyptian Tourist Authority, contains a lot of information.
Tutankhamun - Civilization.ca's Mysteries of Egypt are for Tutankhamun - decent
Burial of Tutankhamun - Information is okay, has some good links at the bottom of the page.
Akhet Egyptology - Good Egyptian site period.
EgyptVoyager.com - Similar to TourEgypt.com but not an official site for the Egyptian government. Seems to be a private tour company, but good info nonetheless.
Tutankhamun's Wardrobe - The official site of the Museum of Textile History in Boras, Sweden, where extensive research was done on the clothing from Tut's tomb.
The Treasures of Tutankhamun - Good general site concerning the tomb of Tutankhamun and its treasures.
The Egyptian Museum - Official website of Cairo's Egyptian Museum where many of the peices originally reside.
Theban Mapping Project - Information regarding the mapping of the tombs in the Valley of the Kings.