We've just learned(albeit, rumorly but hey we all knew pretty much) that this franchise wants to stay put with the Brand/Iguodala combo. At least, for now. But if it wants to keep this core and try to win, then the first thing they need to do is actually do that: try to win. This core isn't enough, something needs to be added to it. Particularly, a good big but those are rare to come around. So we go with the next best thing: Talent, period.
Hamilton's deal isn't that bad anymore, especially considering our next time of cap-space is 2013(where he'll expire). Rip has been settled to the end of the Pistons bench, for the likes of Rodney Stuckey and Will Bynum. Why? Because they've "won" with this lineup, much like the 76ers have "won". Lou and Speezy are similarly fated to be bench players, and Doug's giving them too many minutes.
Rip can still run off screens and hit the 15 footer, and he can create his offense. He'd force Meeks to come off the bench and overall he makes us a better team. Imagine, playing with a true PG like Jrue Holiday?
Iguodala for all intents and purposes is our back-up PG, because Lou doesn't qualify. This is a move where we lose nothing, and gain a former all-star 2 guard that's quite frankly in the middle of his prime, his situation is a replica of the hell hole that is Detroit.
We lose a "big", but Speights has been so underwhelming that in this his 3rd yr we're still celebrating the things he's done in his rookie/sopho year. In short, he hasn't grown whatsoever as a player. We get much better with this trade.