I was just checking this out yesterday because there were some pull requests on lobsters referencing barnacles.
This is the first of many spin-offs using the lobste.rs source code and I think it's a cool initiative!!
One of my feature requests to lobsters was to incorporate Oauth provider so it becomes an alternative identity/auth source. The invite tree and the moderation log will cause it to be one of the most trusted of these providers.
My request was rejected by jcs, but it will be cool to see you incorporate this.