However, on the fringe/frontier of Imperial territory, anything goes-Water Caste traders do operate on fringe Imperial worlds, Blood-Axe Orks are bribed with weapons to attack other threats, Kroot fight alongside Imperial Guard, Squat work as Tech-Priests (although, they aren't Xenos, per say), and Eldar occasionally co-operate (or just blow their erstwhile allies to pieces).
You should be very careful! GW doesn't like posting even single stats or rules on messageboards. I don't know if they're aware of this board, but those boards dedicated to their systems are in constant danger of being closed if things like this happen. Just a friendly warning...
Master of Dragons
Up to about p. 405, now, well into the spells, and finals end tomorrow. Expect a finished errata by the end of the month.