It's good that he has been sentenced. However, I doubt that it will change much in Iraq, as Saddam is unlikely to be of much use to the multiple insurgencies. I don't think that any of the insurgents ever thought he would get back in power, even if the Ba'ath Party were to take over again. And the idea that one of my friends suggested, that there are lots of people in Iraq who love us and want to help us, but who are not doing so because Saddam is still alive and they fear he will make a comeback - I sseriously doubt that there are a significant number of people in Iraq whose actions for or against us are determined by thoughts about Saddam's fate.
Definitely some will protest his execution, because as a Sunni Arab, he on some level is considered to be representative of the Sunnis in general. He is, in a sense, their man, and they will object to his execution for that reason (even if it is a pro forma gesture), or because as Sunnis they fear reprisals or alienation from other Sunnis if they are not seen as "part of the team." However, I doubt that many really have their heart in it for Saddam's sake, and likely this will pass quickly, as they have far more pressing concerns that they will insurge for.
That is all.