Haven't seen too much news about this, either on these boards or really anywhere, but I got this email from the Sox last week:
Family Field Day and Garage Sale is Saturday, May 18.
Runs from 9-2. Garage Sale is free to the public with all sorts of random **** on sale (I got my Mike Sirotka jersey there, plus I've seen stuff like old LED lights from the scoreboard). Clubhouse tour tickets are $10 and available day of. The Field Day is $30 per adult and $12 per child. There's a link to buy tickets in the link above.