The crew at renderweb have developed a novel way of both rendering and sharing your blender animations on Facebook. Using RenderWeb you can submit a job to be rendered by other users and your Facebook friends, and the results are automatically uploaded to Facebook for sharing (along with the high quality frames just for the author) once it's finished. Jobs are prioritised according to your friends using the application, so the more of your friends you convince to join the faster you'll get your renders.
An overview of the app from the RenderWeb website:
You can find the application here:
The renderweb website with more information: