I'm all for USA going weaker, as they act we can't have them as a superpower anymore. But the problem is that we will go down with them, and I obviously don't like that. But there are some economics who think Europe might benefit from it if the Euro gets stronger and if it takes a somewhat long time before USA's economy is completely ruined. But as it looks now, USA will go down too fast for us.
Although, I must admit I also fear USA's weakening. Most looks like China will be the new superpower, and we don't know how they will run the world. We can only hope they won't force their sick communism on other countries.