Per Bulls email press release:
Chicago Bulls forward Carlos Boozer sustained a fracture of his right hand (5th metacarpal) on October 2, 2010. He was evaluated by team physician Dr. Brian Cole and hand specialist Dr. Marc Cohen of Midwest Orthopaedics at Rush. The fracture will require surgery and Carlos will likely be out 8 weeks.
And so it begins already. What's interesting is that he injured the hand on an off day from practice, so it will be interesting to find out that story.  per ESPN Chicago: According to team sources, Boozer tripped over a bag in his house and fell.[/edit]
Injuries were one of the prime concerns of signing Carlos Boozer, and prior to the first pre-season game, Boozer is out with an injured wrist for eight weeks.
This is going to leave a serious mark on the Bulls attempt to capture both the division, and the fourth or higher seed. They're fortunate that the injury happened early, but eight weeks still means the Bulls project to miss Boozer for 15 games which is a bit under 20% of the season.
Boozer's presence also robs them of his talents against the western conference on the circus trip and will make things especially difficult for the Bulls during a difficult period of the schedule. I'd say the injury probably already costs the Bulls around four to five wins on the season which should considerably lower expectations for the season win totals.
Prior to the news, I felt the Bulls could compete for the 3rd seed and even had a shot at the 2nd seed in a complete upside scenario, but the rest of the team will likely need to play out of their minds early in order to compensate for the injury.
On top of that, they won't get any practice in running the pick and roll with a dominant power forward, and Boozer won't have had any time to develop continuity with the team which means even when he comes back integrating him into the offense will still be challenging.
At this point, all we can say is at least it wasn't worse, but it's bad enough.
In terms of the Carmelo trade, the deal is likely dead now, as the Bulls are really hurt with a lack of front court depth without Boozer around. However, I'm not sure it should be.
I could still go either way. If a trade improves your team with Boozer in the fold then you make it. Suck up the losses, and prepare to be much better when he comes back healthy. Melo's scoring would also help tremendously without Boozer to provide some offensive punch to this line up.
Given that talks seem to have broken down anyway, and it looks like Denver may wait until the deadline now that camp has started, it probably wouldn't effect a trade