Shaq at his best was at the 3-Peat era; Shaq of the Lakers 2-years ago was HORRID. He was FAT and ungainly. He's getting back into shape, which is great.
As for Team USA, it's being built around Kobe because since it's a 3-year commitment they needed to have that one constant piece, and they decided it was Kobe. They needed players that complimented his style, and I don't think Iverson would have fit that style. Sure, you got Paul Pierce, LBJ, Wade and 'Melo in there that sorta play the similar style Kobe plays, but they can also play other roles easily. Whereas Kobe and Iverson, IMHO, are pretty set as the single-minded, scoring assassin that need to have the ball at all times. With LBJ, or 'Melo, or Wade, they're much more comfortable to a single role.
They're really trying to push having a team that knows each other really well, hence the 3-year commitment. They can't wing it like they've done in the past cause the rest of the world is catching up to the Americans.
As for Iverson being traded, I like players who stick to a single team throughout their careers, or at least most of their careers. Magic, Larry, Isiah, Stockton, Reggie...and I guess you can count Karl and MJ in there, too, even though they played for other teams at the end. There's just something to be said for loyalty that's been missing in a lot of other players these days. I don't think it'd be good for Philly to trade Iverson at this time unless they got something solid in return; Iverson will flat out play regardless of where the court is in the country, but he really would much rather stay in City of Brotherly Love, I think. However, if he was ever traded, it'd only be fair to put him in a team that can be a contender. It's gunna be a tough fit for him anywhere, cause just like Kobe, he draws so much attention that the gameplay has to be designed around him. I'd say places like Indiana or Detroit have systems already in place that would fit with him (replace Peja, or Rip with AI). But I don't think either of those teams will mess with what they've got right now.