The security threat of sea level rise to small island states appears to have proven so obvious as to overcome the common objections of many countries (notably P5 members China and Russia) to framing climate change as a threat to security. Just yesterday, the UN General Assembly passed by consensus a non-binding resolution linking climate and security. The final version of the resolution (GA/10830) is not yet online, but the May 18 draft resolution gives you an idea of the final language.
Symbolic, yes, but perhaps this will make it easier for climate security questions to come before the UN Security Council again. The April 2007 Security Council session on climate change and security, at the behest of the British chair at the time, was, shall we say, met with a mixed reception, but 2009 is already different than 2007 in so many ways. It will be interesting to watch where the discussion goes from here at the UN and in national capitals.