I have offered myself to Dr. Samek, to translate "PSSiCC" to spanish. He has forwarded the request to the publisher, CMP books, to see if there is a market. I think the book is good and deserves a spanish translation. If you look at amazon.com it is approx. 11.000 and "Design Patterns" is approx 6.000. Obviously "Design Patterns" has been translated (late).
I am on the program committee of the Workshop on Game Theoretic and Decision Theoretic Agents GTDT04. And I am quite happy to be. :o)