There has been a long thread about WoW and the philosophical changes and approaches over the past four years, and in particular to some of the larger design decisions made recently (dual specs). In it Ghostcrawler makes an offhand remark about WoW's subscriber numbers:
"Wrath of the Lich King is still selling very well and our subscribers are increasing."
Now I want to be clear that this was made off-hand and is not from an official earnings statement. But that doesn't discount it from being full of truthiness; and nonetheless, this is rather significant in that it's been a while since we last heard any indication of current subscriber numbers. To some this news won't be very surprising, given that Wrath of the Lich King has been a huge hit. But others might raise an eyebrow that after five months of Wrath things are still up-ticking.
He also mentions the ever hot topic of multi-boxers: