I think that is a mistake. Kidd isn't the player he was, and although he would help Dallas, they can't afford to give up Dagsana Diop.
Seriously, Kidd is only shooting 36% from the field, and although he puts up a lot of assists, he's not a top 5 guard in the NBA anymore. At this point, Andre Miller is a better player for a team that needs a point guard that can score and run a team.