No news on its release date yet, but it is supposed to contain artwork from the Orion RPG and Togi-Hime Zohushi (from which the images for the 2004 calender were taken). I also found an image of the front cover on the following web site:
http://www.shirowledge.com/artbook.html#ID05
Intron Depot 5: Yamataiko
Moderator: sonic
Intron Depot 5: Yamataiko
For in that sleep of death what dreams may come
When we have shuffled off this mortal coil,
-Hamlet
When we have shuffled off this mortal coil,
-Hamlet