We all knew it was coming, so here it is!

Actually two trades here:
#1: Simple Sacramento/Boston Swap
To Sac: Rondo
To Bos: Williams, Mcelmore, Sac Unprotected 2017 1st
Boring, yet simple. All of the drama with the coach may mean they're looking to make a shakeup immediately, and with all of the stuff I've read about their GM/Owners, they don't seem to be the sharpest tools in the shed. We'd get a good, sweet-shooting 2 to pair with Smart, an expiring contract, and a future first. I think they'd probably do this trade without much thought.
#2: The blow it up/huge megadeal/fireworks Sac/Bos/Det/Phi trade
http://espn.go.com/nba/tradeMachine?tradeId=q4en8qySac: Rondo, Smith
Bos: Williams, Mcelmore, Evans, 2017 Sac 1st, 2015 Det 1st
Det: Green, Collison, 2015 Clips 1st from Bos
Phi: Landry, 2015 2nd round pick from Philly (via Boston), 2016 Cleveland 2nd round pick (via Boston)
Now 4-team trades are generally thought of as too complicated, but this really isn't that complicated. Philly is only in the deal to make the money work and collect assets, so it's really a three team deal.
Why Sacramento does it: It's rumored that Malone was the big hindrance to getting Smith, so with him out of the way they might try to restart those deals. This trade would give them Rondo and Smith, and it would virtually ensure (one would think) that Rondo stays and resigns with his two buddies in Gay and Smith. This would give them a lineup of Rondo, Stauskas, Gay, Smith, and Cousins: a highly volatile lineup with TONS of potential (but also questions of fit).
Why Boston does it: Why not? This trade would clear up playing time for Smart and provide him with an ideal, sweet-shooting backcourt mate for the future. Mcelmore is no slouch on the defensive end either. It also would upgrade our 2015 Clips pick for a much higher first rounder in Detroit's 1st round pick. This would give us two (probable) higher lottery picks that would give us plenty of options in the draft. We'd also only be taking on future salary in Mcelmore, so that's also a plus.
Why Detroit does it: Detroit gets out of Smith's God-awful play/contract for a team (!) that actually wants him, and they get a real small forward to pair with their bigs. They'll lose their likely lottery pick, but they'll swap it for a late first rounder, a very good player in Green, and an upgrade at the point guard position.
Why Philly does it: They suck and are gathering assets, so why not? They're below the salary minimum anyways and don't plan on being good for the life of Landry's contract, so picking up some 2nd rounders for him is an easy way to collect more assets.