Am I the only one thinking we might get the first expansion this year already? There are couple reasons why I think this might be the case. All of these are pretty anecdotal on their own but put together I think they might be a hint of something:
-First of all very soon after the release Stephen Ericksson(might remember wrong who it was) said they had finished some new big milestone(ie. stuff that isn't in the game yet) in writing and would keep the Hollywood voice actors employed for years.
-They have now many times said we would see the class stories continued this year and I'm 100% sure the only time they will add new chapters to the game is in expansions, of course continueing the class story might mean something less than a full chapter.
-In beta they had all the planets and major graphical assets in months before the actual launch giving them plenty of time to already work on new art assets for the expansion(and patches obviously), also they have said they still have full staff working on the game and I think we can agree that obviously not all of them are currently working on the live game.
-I believe there was some EA shareholder info that actually clearly hinted at SWTOR expansion scheduled for Q4 but Google fails me now