What would be really great for bitcoin is if an entire town adopted it as their local currency. If you get an opportunity to talk the Icelandic folk again, I propose you ask them if they could try to allow one town to opt-out of the national currency and use bitcoins as their main currency. If they would allow people from outside Iceland to get temporary visas to live in that town, that would be even better.
There is no ready system for that. Where are bitcoin cards, or whatever to use when paying for food in supermarkets? Get out the laptop and transfer money? how can a city or even a small village realistically adopt it?