Someone named Bill Ingram is reporting:
James Posey is expected to announce that he'll re-sign with the Boston Celtics in the next 24 hours
I don't know anything about this source, so take it for what it is worth.
Update: Marc Spears reports otherwise
The agent for Celtics forward James Posey, Mark Bartelstein, said early Thursday evening that there was "nothing new" in regards to his client's free-agency situation.