I reckon there would likely be a market for exotic animal species. Could be a lucrative trade, if you had the skills to handle it. Might even foster the creation of a new faction type.
Saying that Hal, look at the size of some of the creatures they managed to stuff in there.
Rio, anything to do with that is unknown at the moment. I know quite a lot of people would love to be able to drag around a pet, or even feed their priosners to it (combat with creatures in your party, yay!), but that will be decided when everything else is coded.
Srukk, I asked about that when I did a little work on creature rules. The problem is that you'd have to set the creature as a container, just like a vehicle. So you'd ride 'in' the dewback, just like you ride 'in' a swoop as opposed to 'on' it.
A little wierd, and apparently quite a hassle to change the code to do it any other way.