If you want to host your own Docker based/backed CI service then you cannot go wrong with @droneio, I very highly recommend it.
Just deployed @opendeis v2 on Google Container Engine (GKE) and deployed my first app. Extremely impressive, this will blow minds at work.
I wonder if the @DockerCon keynote is available anywhere, I hear it is awesome? Also, just signed up for Docker for AWS beta.