I don't care if he is in Episode III.
It would be cool if there was a scene where we saw, say the Slave I (with the new green paintjob) taking off from a port on Coruscant or Tatooine. It would be nice.
I wish Fett wasn't as popular as he was. I preferred him as the ORIGINAL Fett, the guy with no name, nobody ever saw his face, and he was a sneaky and elusive git.
With Fett's ridiulous popularity, the character was ruined (for me) because a) We know everything about his past - mystery is dead, and b) We realise he used to be more annoying than Anakin as a child.