Natalie.mu has an article on the CLAMP Pia mook with some preview pages here.
The PW-momoko ae ＜CLAMP＞ doll has sold out of its first run and will have a second preorder run starting September 22nd. Included with the doll will be a postcard with CLAMP's illustration. More info here.
Tomaoki Maeno (Kobato's Fujimoto), Sayaka Ohara (xxxHolic's Yuuko) and Mika Kikuchi (TRC/xxxHolic's Mokona) have been added to the CLAMP Festival guest list. Their appearance schedule is here.
Code Geass: Akito the Exile Chapter 1 Blu-ray/DVD will be released January 29th, 2013. No CLAMP-related extras, but more info here.