[American whistleblower Snowden via video link from Moscow regarding International Treaty on the Right to Privacy, Protection Against Improper Surveillance and Protection of Whistleblowers in New York]By Alister Doyle OSLO (Reuters) - Former U.S. spy agency contractor Edward Snowden, peace negotiators in Colombia or Greek islanders helping Syrian refugees were among tips for the 2016 Nobel Peace Prize at the deadline for nominations on Monday. Nobel watchers also speculated that negotiators of an accord over Iran's nuclear programme could be in the running after a surprise award last year to a coalition of Tunisian democracy campaigners, the National Dialogue Quartet. "2016 may finally be Edward Snowden's year ... His leaks are now having a positive effect," Kristian Berg Harpviken, head of the Peace Research Institute, Oslo, told Reuters, putting him top of his list of candidates.