Bioware have announced that the Extended Cut DLC for Mass Effect 3 will be released for XBOX 360 and PC and US PS3s on June 26th and for PS3 in Europe July 4th.
This is the DLC that expands upon the ending of Mass Effect 3 supposedly clarifying it and showing more how your Shepard influenced the Galaxy.
The DLC is 1.9GB in Size and is free to all owners of Mass Effect 3.
Bioware have placed a Q&A and a Podcast here to give you more information about the DLC.

