1. Get from the building to a diplomatically immune car and out of the EU. Not going to happen: the fuzz will snag him the moment he steps out of the door.
2. Wait for a politically sympathetic party is voted in and the extradition rules are changed. Not going to happen: people are too stupid to vote for anything other than "the big two" and if they did, they won't change policy or America will go all "Fuck Yeah" on our arses.
3. Wait for the whole thing to be uncovered publicly as a fucking massive international political scam and he is pardoned.
4. Hope that Kurzweil was right, upload his conscious mind to a machine with OpenSSH and SCP himself overseas.
I reckon (3) is most likely.