@spyman - Well first off they were Icelandic banks which only had branches in Iceland, and maybe a few here and there in Europe, but it was near exclusive to Iceland. They were also the *only* banks in Iceland (as far as I know). When their loans went bad, they would have had to declare bankruptcy without government help. If they had gone all the way under, the entire savings of almost every man, woman, and child in Iceland would have been lost. I'm not sure what the conclusion of the crisis was, whether the banks still exist today, but it was a choice between the government going bankrupt and the entire nation losing it's savings.
@Putin - when in history have Great Powers not had rivals they worried about? It is a naturally occurring phenomenon and its just human nature. My qualms with China aren't because they are Communist, but because its rise (in the direction its going) runs counter to US interests and alters the balance of power in the world that I currently like. I could care less if they were communist, state capitalist, or whatever, so long as they play by the rules and are friendly with the US and our allies.
Now, does that mean China's a bigger problem than a failed state? No. Syria is a much more pressing concern, as is Somalia. However, long term I would say we must always "Watch our backs" with China and make sure they act as a Great Power should, etc.