Well, I think the US is actually doing an "ok" job of managing the internet. If you have to hand over control, give it to anybody EXCEPT for the UN. The UN is a joke, full of even more corrupt politicians than in the US (and we have many!).
Well, it's nice if a US citizen would have that opinion... but I'm not a US citizen and I would prefer the Internet to not be under US government control.
Imagine if it was the Chinese government that was in control, or (for the sake of argument) the British or French government. Would you be ok with that?
I (and many people) are in favor of give control to the ones less likely to corrupt/change it; unfourtunaly we dont know who that is so is better to stick with the one already in control to avoid surprises.
As usual, research your own propaganda, but here is one bit to digest: http://www.canadafreepress.com/2006/rosett040406.htm