I don't think Snowden should go to prison, but if he does it's because he's the only one who did anything illegal. There's nothing illegal, under the FISA Amendments Act, about AT&T or Verizon sharing the information they collect about your usage of their networks. The default presumption is that you're allowed to share information in your possession, unless restricted by some law. HIPAA protects medical records, FERPA protects educational records, etc, and FISA/ECPA protects electronic communications in certain circumstances, but the monitoring programs here, as far as we know, are written to avoid running up against these laws.
Civil trials aren't guaranteed to have a trial by jury, but maybe if the government is one of the parties, the other party should be able to demand a trial by jury.
Of course juries are not as independent as they should be, with jurors being kicked out for not following judges orders, or verdicts being thrown out by the judge, or juries being intimidated by judges into ruling a certain way.
Bottom line: another July 4th is brewing... good. We need it!