keeveek: No. France is the second major power in EU, so it's ultra important who is ruling France.
timppu: So what will change now?
As long as it is not Le Pen, I don't think it _really_ matters to other EU countries who is in charge in France. I am quite confident that France's stance on EU and euro will not change almost at all, even though Sarkozy was replaced by Hollande.
Here, a preview:
http://www.bbc.co.uk/news/business/market_data/ticker/markets/default.stm For one thing, rather than help save Europe, France will now need European help to save their own economy. Except that Europe can't, France is too heavily indebted.
Le Pen would have been better on that point, as she would have left Europe, and she would have been left alone to die.
France benefits a lot from the fact that other EU countries partake in saving French banks (which they shouldn't be) with their trash Greek loans, so I don't think Hollande will change France's EU policy that might jeopardize any of that.
Dexia was one of the main Belgian bank too (and mine, actually). That's why Belgium saved it.
For France's domestic politics, it may have more meaning.
Now, as for Greece, if they are now unable to create a credible government that the other EU countries and the French/German/UK banks trust, it may start the chain reaction which crumbles euro, and maybe even EU. Suddenly more and more politicians don't seem to deem it unthinkable anymore that Greece would be kicked out of euro, and maybe even EU.
France domestic politics will now be to spend heavily to try and reboot the local economy. But, money don't appear out of thin air.
As for Greece, it won't really matter (on an international viewpoint) who get the power there. Before they can do anything, they will need to pay back their debts, which they can't. They will be kicked out of Euro anyway.
Kicking out Greece will show the "market forces" that a country can indeed be excluded from euro/EU (causing lots of damage to creditors who believed otherwise), which will mean they will not want to loan any more money to any of those other countries either. There's the chain reaction.
Money doesn't care for loyalty. Belgium, Germany, the UK, ... will stay solvent, and that's what will matter for investors in the end.