According to a Comic-Con panel reported by Darth Hater, senior
creative director James Ohlen said BioWare hopes its most expensive
project Star Wars: The Old Republic
will last for decades. EA has revealed that each of the six SWTOR
classes pack 200 hours of gameplay, not taking into account side
activities like PvP, crafting and raiding. BioWare will have new
content for SWTOR until 2025 as the game progresses.

JO: Well, I can say that we have 19 major worlds. Then we have an
indeterminate number of minor worlds. And our goal, obviously this being
an online game, that we're hoping is going to last for decades, we're
going to be, obviously, adding more to the galaxy map as the game
progresses. We want to add dozens of worlds. Hundreds of worlds
eventually, in 2025, we'll hopefully have 500 worlds.

SWTOR: TBD to TBA, Official Pre-order Lives Now!

As to SWTOR release date and beta testing, the wait is nearly over!
Early game access to the world of SWTOR should be around Christmas
time.



"We are going to be beta testing weekends in September and right now
our release window target, we are targeting holiday 2011 as our release
window."

guess eir is correct that release is around christmas heh