Could care less. He's gone. I won't cheer for him and during games against the Celtics I will be hoping he sucks, but I could care less if the crowd boos or cheers him.
If sometime in the future they have an occasion where they have a day of celebration for that 2008 team, I will gladly cheer him for what he meant to our team during that era, but for right now, he's just another guy on another team that I could care less about.
Gotta say, I never see him rising to the ranks of NBA players I hate LeBron or Wade or Kobe or Iverson. Not even close.