The theme song for the CLAMP FESTIVAL 2012 is called Sora, Kaze (ソラ、カゼ) by Kotani Kinya, who also performed the theme songs for the Tsubasa anime and movie.
The single will be released on October 3rd and the jacket was illustrated by CLAMP:
See larger size at http://kotanikinya.net/
The single includes a DVD with a special movie produced by PRODUCTION IG (4 minutes length).
The tracklist for the single is as follows:
1. Sora, Kaze
2. Junketsu Paradox (Nana Mizuki cover)
3. Platinum (Maaya Sakamoto cover)
4. Sora, Kaze -Original Karaoke
5. Junketsu Paradox -Original Karaoke
6. Platinum -Original Karaoke
The single also comes with a random (out of 2) Mokona seal.