Boston.com Front Page 12/10 5:19 AM implies that it's a two way race for Ted Kennedy's Senate seat.
From the article:
"Brown, a state senator from Wrentham, signaled he would go after the attorney general with everything he had. She indicated she would do all she could to ignore him."
But in the 28th Paragraph a third contender emerges:
"A third contender, Joseph L. Kennedy, an independent from Dedham who is not related to the famed political family, also filed sufficient signatures to qualify for the Jan. 19 ballot."