According to Jimmy Murphy of MTLHockeyNow, who has excellent sources in the NHL and often quotes executives, the Montreal Canadiens "would be lucky to receive a third-round pick, in exchange for Dvorak."
This makes it clear why Kent Hughes did not trade him. This is quite a change from last year, but anyway, it could change quickly, with a good start to the season.
With Montreal's surplus of centers, it should come as no surprise if Dvorak is traded, but don't think Hughes will settle for a third round pick. The Habs general manager will be waiting for the right opportunity and the right time.