I'm really excited about all the activity in the federated, self-hosted space. However, I feel like there's still a missing piece around identity. I don't want to have to create a new user every time I want to use someone elses shiny new federated event sharing application or what have you.
There don't seem to be any great self hosted OpenID providers out there and OpenID only solves the authentication part anyway. Maybe I've missed some obvious solutions?