Yep, Greece following the Iceland model is a realistic alternative. It wouldn't do much to stop the dominoes from falling, but it may be a way out for Greece.
dougwalkabout -- as I understand (and I'm certainly not an expert), Iceland repudiated the debt incurred by their central bank which was a privately owned institution much like the Fed in the USA is privately owned, not government as many seem to believe.
In The Meantime Iceland Is #Winning Iceland fared better by letting banks fail Daniel Hannan: "until they leave the Euro, the Greeks have got no light at the end of the tunnel"