I have an idea: a website that just keeps a friends list. OpenID-compliant, no additional functionality. Open API. Everything else feeds off it.
No money-making strategy, though. Maybe it should just hide under the umbrella of an already successful megacorp who wants to use it for their own service, like Yahoo or, like you mentioned, Facebook.
No money-making strategy, though. Maybe it should just hide under the umbrella of an already successful megacorp who wants to use it for their own service, like Yahoo or, like you mentioned, Facebook.