Official art by Clamp
Clow (front of manga) / Clow (back of manga) / Clow and Eriol / Clow resting / Clow standing

Fanart
Clow sleeping (fanart) / Clow (back) / Clow smiling /
Eriol and Spinel Sun / Fujitaka reading (not ready) /
Clow (CK Ad) / Clow snoozing? / DJ / Oops! /
A summer's breeze / Shower ... / Bus Ride /
Clow cosplaying as Alucard (hellsing) / Gagged /
Cuddle up / Bride and Groom / You are the One /
Clow Minekura style / Halloween *last 2 new*

Screencaps
My sheep named Eriol
Fanart by other people*new pics*
The Sky, his Sun, his Moon *new* short story on the life of Clow

Other pages at which you'll find Clow images
Jaana's cell collection and Ina Chan's and Sakura Star and screencaps at Kind Smile.

Information on Clow/ Rants/
Information on Eriol and Fujitaka *mega-spoiler*/ Links