I've already said a few times that I'd love to see Blizzard's population figures, but a query (from an MVP, strangely enough) brings up another set of figures that I wouldn't mind a look at: NPC vendor sales numbers. Crepe wants to know how many items Griftah has sold (and how many hula dolls he sells post 2.3), but unfortunately, Nethaera deflects the question and leaves us with nothing. Additionally, I'd like to know how many heroic badges G'eras is going through on any given night-- maybe the fact that he's not selling many of his Heroic items is the reason why Blizzard is going to start dropping Badges in both Karazhan and Zul'Aman next week.
Blizzard has given us peeks at a few numbers behind the game, but they haven't updated that page since it went up (and with all the exceptions on those lists, it's not much help anyway). There is a whole new world of statistics to be had in Outland, and it'd be nice for Blizzard to let us at just a few of the most interesting ones.