Why do people always say stupid shit about quitting, or "Wow, another expansion" when another expansion is announced? It's not like Sony has changed their schedule since about the time PoP came out, so excuse me if I call a spade a spade and say that you're either extremely unobservant of patterns, or a just a tard.
Let's take a look.
PoP: Oct. 21, 2002 (Level cap+)
LoY: March 3, 2003
LDoN: Sept. 8, 2003 [Instances]
GoD: Feb. 11, 2004 <Hardcore raiding>
OOW: Sept. 13, 2004 (Level cap+)
DoN: Feb 15, 2005 [Instances]
DoDH: Sept 12, 2005 <Hardcore raiding>
PoR: Feb 21, 2006
TSS: Roughly Sept. 15, 2006. (don't know the exact date, but was about then) (Level cap +)
So, if it isn't completely obvious by now, let me put it more clearly. This will be the start of the 5th year where Sony has put out one expansion in the fall, and one in the winter. There are *other* trends...for example, this so-called "BS" expansion will most likely be an expansion centered around instanced content a la L/DoN, and the next expansion will probably be a raiding centered one, but who knows, really.