Some mention of hosting this on GitHub and BitBucket here. I can't imagine Git-As-A-Service providers would be thrilled with this kind of application, it will completely hammer their services compared to the occasional commits and pulls that occur with a code base.

It will probably update their conditions if they don't already preclude it. Or maybe they will embrace it with a premium pricing plan. I certainly wouldn't count on hosting this against BitBucket's free plan.