still no official word on the subject?
No, and do you know why?
EDIT: Okay, maybe that was a bit harsh. The answer is that there is no benefit to working on cards now, before the game's release. You can only release the game and make a first impression once. Cards can come out any time at all afterwards.
Answer: If Dragon Commander priorities were listed on a scale, with 0 being the lowest priority, and 100 being the highest priority, Working on Trading cards would be a -263. Giving the official word on trading cards would be somewhat below that.