The more I think about Tunisia and the more I'm convinced that the real role could be for the EU.

How about this slogan: Let's make Tunisia for EU what Israel is for the USA!

If you think that Gheddafi is asking EU for 5 billion Euros/ year to limit illegal immigration, my reasoning is about to indirectly threaten this deapotic regime with a new political model at his border. Let's not fear the Brotherhood.
Tunisia is not at the center of any geopolitical problem and the reality of government responsability (without the cash of energy reserves) could help in moderating. Sooner or later it has to happen. Better in a little country with strong intercoonections with western europe.