I hope this helps dispel some of this talk of Blizzard apparently only planning 1 or 2 more expansions

I don't think they will even need to be making massive amounts for the expansions to keep rolling out. EQ has had 19 expansions. If WoW ever goes free to play (down the line, not any time soon IMO) they will more than likely have a surge of funds at that point, effectively extending the life even longer. I think WoW will have at the very least 3 more expansions.