There's a promo video here:
http://www.zero-tsukaima.com/fair2006/index.html
Volume 8 of the seinen novel
Zero no Tsukaima will be released sometime on June 2006.
It will be released on 24/6/2006 or 25/6/2006 (just like the other novel volumes were released either on 24 or 25)
I'll post its cover when its out.