jdrakeh
Front Range Warlock
The main Rokugan books were published in 3.0 years, and were not updated for 3.5, and neither was the D&D Oriental Adventures book (which serves as a foundation for the Rokugan books themselves), so it could be an example of another fantasy setting which technically requires to be played using 3.0 (although, practically it's not THAT important, especially since it has its own character material for most classes).
Looks like I may need to pick up a few more 3.0 books on payday!