Ichijinsha's special pages for
Amatsuki and
Hatenkou Yuugi manga:
http://www.ichijinsha.co.jp/special/hatenkouyugi/
http://www.ichijinsha.co.jp/special/amatsuki/
An anime adaptation of
Hatenkou Yuugi will start broadcast on January 2008.
Official anime sites:
http://hatenkouyugi.com/
http://amatsuki.com/
The anime adaptation of
Harukanaru Toki no Naka de 3 Kurenai no Tsuki will start broadcast on December 28, 2007.