Looks like the Mavericks and Stackhouse are under fire due to Stack's comments about being bought out, indicating a pre-arranged agreement, which is a violation of league rules.
Sources indicate that the league will forbid Stackhouse from re-signing with the Mavericks as punishment. If this is the case, then there will be no trade, according to the article, because "Dallas owner Mark Cuban wouldn't complete the trade for Kidd without a belief that he could bring back Stackhouse this season."
Source: http://sports.yahoo.com/nba/news?slug=aw-stackhousesnag021508&prov=yhoo&type=lgns