To reiterate what a few people have already made mention of, i don't think that Dumars went into this trade trying to improve his teams title chances this year. Dumars isnt stupid, he won a couple of titles in his days playing along side a true point guard and (despite the antics of some of his other teammates) did it quietly and efficiently - these a few traits that AI doesn't possess.
I believe that this trade was made strictly because it's time for a youth movement in Detroit; he didnt want to have to pay Chauncey for another 4 or so years while Stuckey emerges as the better player. Rasheed is the next player to go, and i wouldn't be the least bit suprised to see both AI and 'Sheed gone by the trade deadline. There will be several teams salivating at the chance to land one of these two players come the stretch run, giving Dumars a tremendous opportunity to free up a ton of cap space and get a crop of young guys in return.
Sports are a copycat business, and i think that Dumars is trying to execute the blueprint that Danny designed a few years earlier. Manifest a ton of cap space and young talent and control your own destiny. the FA class of '09 isnt all that great, so i'm not sure that they'll put all their chips into that basket, but their are some guys to make note of for Detroit, which includes: Lamar odom, Shawn Marion, Carlos Boozer, Josh Childress, and Danny Granger.