The Dallas Mavericks free agent mini-camp will take place June 11 and 12, 2009.
Click that link to see more info and a list of the players involved.
There are 20 free agents playing at it. I would guess that the best player, or couple of players, will have a good shot at being invited onto the Mavericks summer league team. And if one guy really stands out, perhaps the team will offer him a contract; probably something short, like one year, maybe two at the most, probably nonguaranteed.
Most of the players on the list are known guys.