I will be interested to see this. The only anime I have seen by clamp is Tsubasa and I've not read much either. I have X in my back catalog which I'm looking forward to a lot. OH WAIT, is Chobits Clamp? If it is, I've read half the manga series and loved it. I can't wait to get the Blu-Ray.
Chobits is indeed by CLAMP.
There is also Angelic Layer, X movie, xxxHolic, Magic Knight Rayearth, CardCaptor Sakura, Tokyo Babylon (prequel to X), RG Veda, Miyuki-chan In Wonderland, and CLAMP School Detectives.
They also did the Character Designs for the Code Geass Anime, Moryo no Hako Anime, Sweet Valerian Anime, and will be doing them for the new Blood-C Anime. ^^