http://www.guardian.co.uk/world/2013/jun/09/edward-snowden-h...
If this wasn't a priori the best theory, surely the HK part adds some Bayesian weight.
Not to say that it isn't true, but at this point a whole wide range of things could be.
http://www.mediaite.com/tv/former-cia-officer-officials-cons...
Next would probably be the middle east or Korea.
Edit: Maybe he left Hong Kong after the interview but before they published it?
Iceland cannot make guarantees either. Also, I suspect that booking a flight would raise a lot of suspicion. Spies spy on spies -- people like Snowden are just as likely, if not more likely, to be watched, than your typical civilian.
THis is amazing.
A hit on Snowden in Hong Kong would be an immense international diplomatic incident. A hit on him in Iceland would be a flash in the pan (what's Iceland going to do about it?). My hunch is that he's banking on diplomatic tensions between China and the US to shield him.
Hong Kong puts him under China's diplomatic shield without necessarily directly exposing him to the PRC's equivalent of the NSA, who I'm sure are eager to get their hands on him.