When on a social networking panel last week I said something that can be seen as stupid or insightful. Widgets are the battering ram for social networking sandcastles.
Since inception, social networking services have been islands amidst the web. Early calls for interop and identity ownership didn't lead to results, even with Marc Canter barking "FOAF" at every event. Meta-networks make sense in theory, but not as a business like many things meta. Trending towards P2P or personal ownership through client or service is even more ideal, but such decentralization never took root.
This is the walled garden under siege by gophers. No, not those gophers, but the ones that tunnel in a thousand directions and drive Bill Murray nuts. People will discover new services wherever the traffic and time is. Some services may overlay social networking as a service, like MyBlogLog does with a degree of execution. Attention follows. Value shifts to networks that provide both the right attention, openness and composition. My bet is a derivative of blogs.