Boston Globe just posted that Martha Coakley picked up nomination papers for a senate run this morning. It was noted that she had told associates that she would run even if a Kennedy is in the race. So at this point there is no signal of Joe Kennedy’s intentions.
As a side note Ed O’Reilly emailed the Globe to say that he’s seriously interested in a run. That should be a fun Jr. and Sr. Senator relationship: Kerry and O’Reilly.