A month or so ago, we've started a developer-only Google+ community called Sitefinity Devs and in matter of days bunch of developers joined and started discussing all kind of Sitefinity code.
As a result of one of these discussions, Steve McNiven-Scott (@stevemcniven http://www.sitefinitysteve.com/) ended up building a provider for Libraries module for Rackspace Cloudfiles. He also, went ahead and published the code as open source on Sitefinity's GitHub account.
You can check the project out here: https://github.com/Sitefinity/rackspace-cloudfiles-provider
On behalf of Sitefinity team and Sitefinity community, I'd like to say thanks to Steve.
If you'd like to discuss Sitefinity development, have an idea for a cool open source project and/or want to find some people that want to collaborate I invite you to join our Sitefinity Devs community.