Yes. I one of the many things I loved about the BKB mod is that later on he added a lot of trade goods. These included slaves (already in), and most important for me, horses. This can let the steppe peoples get more trading (since they were very big on trading, and bred some horses soley for trading), and may also evantauly be exploited to represent the ideal horse training country. Perhaps a building that can only be built in "Horse" land that gives a bonus to all horses built their?
But I'm babbling.

BTW; nice shave DM!!!
No! Short hair is evil...