Primera's Magic Knight Rayearth page....THE athority on MKR in my eyes...
The Magic Knights Rayearth Image Archive
Kailu Lantis and the Men of Cefiro: Their Loves and their Lives.
animePike's Rayearth link list....a good guide for everything you would want...
Guru Clef's world of Magic made by Lienna.
Dendeshe's Lookout Not exactly a Clef site, more on DBZ and stuff but really a cool sight!