$30+ million in cap space next summer when you figure Rasheed's contract into the mix...
I love this trade. Billups has declined rapidly on the defensive side of the ball (got absolutely WORKED by Boobie Gibson and Rajon Rondo the past couple years in the playoffs) and you get out from underneath his huge contract. They get a proven scorer in AI and a guy that can take the ball to the basket (something they don't have right now). This Pistons team, as it sat right now, was not going to beat Boston... so you shake things up and if they get back there, great... if not, you've freed up minutes for guys like Rodney Stuckey, Amir Johnson and Jason Maxiell AND you have a ton of money to make a run at someone in a strong free agent market next year. I think this deal was a no-brainer.