When Gaddafi's protectors in the West become convinced that he's a hopeless bet they'll turn against him on their own, without needing to be persuaded about it. Thus they'll get rid of the dependencies that he has ensnared them into in such a skillful way. No creditor - no debt...
Too bad but many people will be dead in the process.
The worse scenario: Libya could become the next Iraq. Britain and the US nourished Gaddafi far too long, now they have the indirect power to destroy him indirectly. Later this year the US troops are expected to leave Iraq - they have to go somewhere. Guess where? No, it's not Somalia or Sudan (although there's some oil in the latter).
In Egypt things went kinda more peacefully (or at least that's how it looked). But in Libya, I see little hope for a good solution. The big fish demand and will get the full control on the main resource of the country. In a way oil is like a curse to anyone who possesses it. I can't think of a non-Western oil-rich country which hasn't been plagued with violence and unrest and suffocated with lots of blood.
Let's face it. Despite all the crap you hear from world leaders on your TV, no one actually wants or expects truly democratic governments in the region because these are too unstable and unreliable. Neither does anyone want a well educated and prosperous populace in the region because that would mean it would demand a better control of its own resources at some point. That's not something "WE" desire.
Something curious: the Internet proved to be the ultimate weapon. What thousands of troops, fighter jets and tons of bombs couldn't achieve elsewhere, now the Internet achieved within a few weeks across a palette of countries that looked among the toughest to change. The "social network", IMO, is the most ingenious invention that ever sprang from the labs in Langley. What appears like total freedom of information could easily be swayed skillfully by those who really know how to use it - and thus instead you have total control of information (and disinformation), and total rule over hearts and minds. And mind you, the people it mostly affects are the people who'll be setting tomorrow's agenda in these societies. And all that - done anonymously.
Joke aside, I bet Zuckerberg didn't expect even in his wildest dreams where this would lead.
/ramble