Elton Brand would not give us the size and length that we need down low, but he could be extremely useful to this team as a key backup for KG, a guy who could actually anchor the defense when KG is sitting and give us a solid rebounding presence down low as well.
Brand isn't what he used to be, but as he showed last year with Philly, especially in the playoffs, he's still a valuable player. He's also got a pretty low salary and is on a Dallas team that is, as of right now, going nowhere.
If it looks like the Mavs are most likely out of the hunt for a high playoff seed and probably won't have hope of making any noise this year (as is likely the case, given the fact that Dirk won't be back until January), they might be persuaded to move Brand for some modest future value (perhaps even just a 1st round pick and some filler).
Brand is the kind of simple, calculated move that could help this team a lot without drastically shaking up the complexion of the roster, which I think is ideal.
edit: though it occurs to me that because Brand was a pickup off the amnesty wire Dallas might not be allowed to trade him this year -- can't remember the rules on that. In which case, darn.