Sounds like a waste of money due to AW quality scoring system's content quality requirements.

So how were your results? I don't see the point of using Google Adwords with my facebook fan pages. Seems like facebook would be more targeted.

Unless you have a serious reason,as most of the people above i don't see why would you do that.
On the adwords side,there shouldn't be any problem as long as you have a quality landing page.

I have listen to use facebook adds that point to your website, but never listen about adwords that point to your facebook, in this way you will help only facebook! Anyway you can use facebook adds, will help more then adwords in this cases