From our good friends at the League office:
Beginning today at 11 a.m., the D.C. United at Seattle Sounders FC game from Wednesday night will be aired in its entirety for free on MLSnet.com. It will start out on the media wall like a highlight, then move to the video archive late today: http://web.mlsnet.com/sights/archive.jsp?aType=videoHighlights
Enjoy!