In the Boston area, you basically just have WEEI's "Celtics Thursday". The morning show ussually talks to Doc around 9am, midday talks to a random celtics player I think around noon (not positive on that one), and the Big Show talks to Danny Ainge around 5pm.
Beyond that, everything is driven by whatever is stirring up callers on a given day.
I would imagine though, with the new Big Show, there will be more Celtics talk than normal, simply because both the Big O and Holley are the two biggest basketball guys of any of the regular hosts in Boston.