Thanks Marco.
Most useful of these is probably the Contacts, which contains about 140 characters created by Robskib and myself - they're a mix of Inquisitors, nobles, respected members of the Adeptus, wanted heretics, pawns, and other, more mysterious, figures. If nothing else, they should be useful in helping people write up their reports of the day, but feel free to re-use the cards to run your own campaigns. There's no background for any of the characters other than what is written, so feel free to take them and use them however you see fit. There are two exceptions to that - Calleia is now head of the Carthaxian Conclave (and one of my PC/NPCs) so don't go killing him off; and I plan to build a model for Novia Fraal, so the same goes for her. The rest* are fair game though...
Also, there are quite a few plot hooks thrown in there that could be expanded into campaigns set in the Carthax sector. The story hooks were only added as I found it made it easier to come up with characters if I had some vague context for them - I have no idea what's really going on with the stories, so people are more than welcome to take them in any direction they want.
* Unless Robskib plans to model any of the ones he created, but he'll no doubt tell us if that's the case.