If you smell smoke in the air around The American Airlines Center, relax. It’s not from a franchise slowly being engulfed in flames. It is the smoke of action, the by-product of clutches ridden and gears ground as the Mavericks frenetically worked to get themselves pointed in a new direction this summer. More than half of next season’s roster will be made up of new faces, and there are a lot of introductions to be made. My bigamous relationship with the Mavericks and Pacers means I have some familiarity with a few of the new Dallas transplants; here’s a little of what I know about Jim O’Brien, Dahntay Jones and Darren Collison.