The Celtics did not offer Tony Allen a qualifying offer, so he's an unrestricted free agent. That means we will not have the right to match any offer he gets. I'm sure the team wouldn't mind having him back at a reasonable price, but only after all the other free agency matters are settled, in particular James Posey.
In other news, it sounds like PJ Brown is leaning towards retirement (but won't rule out a return) and it sounds like Sam Cassell is looking at other options.