Want to point out something, and this is very important for those who have pre-ordered. I ordered via EA's Origin, and i got an email confirming my order. At the end of the email are steps to register your purchase.
1) Go to
www.swtor.com/preorder/code2) Click "Register your pre-order" (You will be prompted to log in or create a STAR WARS™: The Old Republic™ account if needed)
3) Enter and Confirm your pre-order code when prompted. (This is listed as “Digital Rights” in your receipt above.)
4) Complete Registration.
5) You will be notified by email of your early access time at a later date.
The code they want you to put in is a cd key format type of code. See if you have one in your receipt/confirmation email as i'm not sure what kind of confirmation you get if you bought from another retailer. This not only registers your game to your SW:TOR account, but also supposedly will allow you early access to the game. Regardless, i think it's important to follow the steps above to get your game registered.
Also of note on my confirmation, I saw this line which made me sad:
Anticipated Released Date: Targeting Holiday 2011