Snowden may just decide to stay put, which may very well be his best option. As The Christian Science Monitor reported, Hong Kong wasn't the worst choice for hiding out:
If Snowden chooses to ask for political asylum, says Professor [Simon] Young, head of the Centre for Comparative and Public Law at Hong Kong University, “he is going nowhere” in the foreseeable future. A recent appeals court ruling, he explains, means that “the government cannot return anyone who claims that he will be persecuted” in the country he came from.
Though technically under the sovereignty of China, Hong Kong is still quite autonomous, and according to Article 6 of the extradition treaty it signed with the US in 1996, fugitives will not be extradited if the crimes they are accused of are political. If Snowden plays the political dissident card right, he may be able to call Hong Kong his new home.