After reading the FAQ I'm a bit shocked this happened and the breadth of information gained. I'm interested in how hackers got access to database and other account servers through the public facing network, assuming any segregation was implemented at all. I guess we shouldn't be shocked that a videogame company was hacked as we've seen this several times in the past few years alone.
They certainly seem to be downplaying it a bit but publicizing this info isn't exactly a positive for them so it's somewhat understandable. I hope that WoW addon is pretty good because Blizzard really needs a big PR win, this seems like a pretty low time for them. Diablo 3 sold really well but so would have a cardboard box with nothing in it with their name. I'm not so sure the same could be said if they were launching it next month.