CD extras were ok...Lets see, there was:
1. An interview between Del Ray and NJO "creative" team (including James Luceno) that bascially just highlights what and why the decisions for the series.
2. Quite comprehensive collection of all things YV (castes, vehicles, weapons, etc.), but not as detailed as UNJOH (
http://www.theforce.net/books/unjoh/)
3. Scans of YV warship, worldship, Jade Shadow, Falcon from New Essential Guide to Vehicles and Vessels.
4. Oh yah can't forget the Vector Prime e-book, but I'm assuming most (if not all) of you have the original book.