Some interesting points regarding this:
http://pme200.blogspot.co.uk/2012/08/assange.html?m=1
I respect the work that Wikilieaks has done, but I think that Assange is a slimeball, and that if he genuinely believes that he is at risk of extradition to the US to be executed for espionage then IMO he is delusional.
The idea that it would be more likely for him to be extradited to the US from Sweden instead of the UK is absolute nonsense, as is the idea that he would be extradited to the US at all if charged by the US with a capital crime (and he has not been
charged by the US, let alone had an extradition request made against him!).
To me, this all appears to be a case of avoiding facing the Swedish allegations, rather than the conspiracy theory rubbish that he is avoiding US persecution and alleged potential execution.
It is easier to extradite to the US from the UK than from Sweden. Why would the US go via Sweden using some bizarre conspiracy involving rape allegations, when it could simply make use of the allegedly rather one-sided extradition treaty that it has with the UK?
[Which, IIRC, was sold on the basis of making it easier to extradite terror suspects... not autistic hackers, bankers, or a man who ran a link site that was perfectly legal under UK law]
Even ignoring the fact that it is easier to extradite to the US from the UK rather than Sweden, if Assange were actually at risk of being executed in the US then it is also a fact that *no European country* would or could extradite him, because of the European Convention on Human Rights.