Has anyone heard any more about Rand Paul's attempt to bring a class action suit against the NSA? There was a bit about it in the immediate aftermath of the revelations and something about him having recruited a number of tea party Reps and some civil liberty minded Dems a few days later.
I doubt it's very likely, but a Supreme Court ruling that warrantless intercepts were unconstitutional would be very welcome. 'The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.' Seems pretty unequivocal to me.
It would also clear the way for Snowdon to return to the US, I can't see how any charges could stick in such circumstances, as I understand it the duty to uphold the constitution supersedes any other laws.