The trade: Sixers trade Andre Iguodala, Samuel Dalembert, and Jason Kapono to Houston for Tracy McGrady, Trevor Ariza, and Kyle Lowry.
Why this trade works: The Rockets turn T-Mac's expiring contract and Ariza into three legitimate pieces in Iguodala, Dalembert, and the seldom-used sharpshooter, Kapono.
Iggy provides Aaron Brooks a backcourt complement for the long-term, Sammy would give the Rockets a legitimate post presence taller than 6-foot-6 (sorry, Chuck Hayes), and Kapono could come off the bench to feed off Brooks and knock down threes. (His long-range proficiency could largely fill Ariza's offensive role.)
Meanwhile, the Sixers free up a boat load of cap space by taking back McGrady, and T-Mac likely puts even more fans in the stands. (A.I. and T-Mac on the same team? Five years ago, the thought of that would make the NBA's head combust.)
The Sixers also receive a solid young piece in Lowry, a Villanova alum who could provide competition for Lou Williams and Jrue Holiday (or who could be traded away later), and Ariza, who the Rockets essentially swapped for Ron Artest this past summer.
While it'd likely take a king's ransom to pry Ariza away from the Rockets, the Sixers have the king's ransom of assets on the roster to make a legitimate offer for T-Mac, while assuring that they receive building blocks alongside McGrady in return.
What's stopping it: Likely, the Rockets' reluctance to part with Ariza. I haven't heard his name mentioned in a single trade rumor alongside McGrady, which makes me believe that he and Brooks are the young cornerstones that the Rockets intend to build around (not counting Yao).
But considering that the Rockets aren't even allowing McGrady to play this season, they can't be expecting a bounty of All-Stars and No. 1 draft picks in return. Trades only happen when both teams benefit, and it's hard to imagine an NBA team in such financial trouble that they'd sacrifice their franchise players for cap space.
If the Rockets insist upon not trading away young blue-chippers like Ariza or Lowry with McGrady, then T-Mac will likely remain a Rocket for the rest of the season.
The Sixers' only reluctance in making this deal, theoretically, would be the state their team would be in after the trade. By shipping out Sammy, the Sixers would lose their only reliable post defender, which could spell trouble for a team already struggling on defense.
They'd have to acclimate Ariza and Lowry to the team's game plan quickly, as both players would be expected to have sizable roles right away.