Ryan Warden, the External Producer for Mass Effect Trilogy, posted a lengthy explanation about the Mass Effect Trilogy on the Bioware Blog stating the the trilogy will release in December for the Playstation 3. Playstation 3 owners who were never lucky enough to play the first game in the series will be able to do so on December 4, whether they download it from the store or but the ME Trilogy. Xbox 360 and PC users can pick up the trilogy next week on November 6.
The Mass Effect Trilogy will include all 3 of the Mass Effect titles as well as the DLC for 1 and 2. Mass Effect 1 will come with Bring Down the Sky integrated into it and 2 will include Cerberus Network, Kasumi, Overlord, and Lair of the Shadow Broker. Unfortunately Mass Effect 3 will only include the original game and will not include any of the content that has been released so far.