It was only a question of when, not if, but it has happened.
They have to clear waivers (Wednesday) before they can sign with a new team. However, all three seem to be headed to teams with dreams of going deep into the playoffs.
The Golden State Warriors want a little depth at the point for the postseason, and they are going with the steady but aged veteran Calderon. He will have limited run behind Stephen Curry and Shaun Livingston, but he will have a role in the playoffs and as a steadying force.
The Washington Wizards are going another, more talented but more combustible direction, and appear the frontrunners to sign Brandon Jennings (Chris Haynes of ESPN had that link. . The Wizards have not loved the play of Trey Burke this season and have leaned on Tomas Satoransky to run some point, expect Jennings to get some healthy run if and when he arrives in Washington.
Bogut is expected to sign with the Cavaliers, although the Spurs could have a shot at him and other teams are asking to get in the mix (not his former team the Warriors, however).