The Facebook Graph Go library created by Huan Du supports the API with file upload, batch request, FQL and multi-FQL. This library can also be used in Google App Engine. Developer provides usage with quick start and guides for user object, valid access token, graph search, JSON response, batch request, and multi-query procedures.
When Nate Drouin, the founder and CEO of Fundraise.com, first sat down with Dustin Dulginow of Atlas Venture he had already finished development of the Fundraise.com Iphone/Ipad applications (the Fundraise.com API came later). That lunch meeting must have gone well because Atlas Venture later became one of the investors that contributed to a $1.2 million round of seed money for the startup.