On NBA fastbreak, they mentioned Harris in the deal (the 3 way with Portland). So Mavs would be giving up: Harris, Stack, George, Diop. THe trade works out with Harris going to Portland and Outlaw/Jack/Diop going to Nets. Anyways I didn't really listen but that's the main points.
But this is the same deal that Cuban reportedly said "step away from your crack dealer" to as Findog posted, so no Kidd to Dallas. I'm sure the trade is pending on if Mavs are willing to give up Harris. IMO Harris + Diop + Stack is quite a lot for Kidd.