The book has been translated!
http://www.amazon.com/Yukikaze-Chohei-Kambayashi/dp/1421532557/ref=sr_1_1?ie=UTF8&s=books&qid=1266737826&sr=8-1
The book this anime was based on has been translated. I just saw it today at Barnes & Noble.
The book is considered to a military sci-fi classic in Japan, similar to the way Americans view "Starship Troopers."