I, for one, don't see this as a terribly bad thing. Governments and large corporations are under the impression that they can do as they please and no one will ever know the wiser.
Quis custodiet ipsos custodes?
I feel this is somewhat disingenuous. He's been under house arrest pending extradition hearings because the UK received an arrest warrant for him from Sweden.
EDIT:
And while it's technically true that charges haven't been formally filed yet, it's my understanding that this is due to a peculiarity in Swedish law where they have to have a person physically present to bring charges. Hence the arrest warrant.
The whole thing's a fucking scam so that the US can snag him without a fuss and then disappear him into their network of black sites.
He's already fled the country once ahead of questioning. It isn't unreasonable to want to have him physically present if the questioning is going to result in an arrest. Hence the warrant.