That's right, we now have a date! SW:tOR launches on December 20, 2011 in North America!
"BioWare and LucasArts are pleased to announce that Star Wars™: The Old Republic™ will launch on December 20, 2011 in North America and on December 22, 2011 in the European Launch Territories! The announcement was first made by BioWare co-founders Dr. Ray Muzyka and Dr. Greg Zeschuk during their keynote address at the 2011 Eurogamer Expo in London, England."
For more info, see http://www.swtor.com/news/news-article/20110924