rStat.us is an OStatus-based microblogging service built by Steve Klabnik and others using Ruby, Sinatra and MongoDB. Because it uses OStatus, it’s compatible with Identi.ca and StatusNet microblogs. In order to follow someone from Identi.ca, just paste the ATOM feed from their profile into rStat.us. Theoretically this should work both ways, but I was unable to subscribe to my own rStat.us account from Identi.ca account.
Yeah, good luck with that.
WordPress and other publishing platforms work well decentralized specifically because they don’t require a single locus to function with each other. There are pingbacks and comments—and if you want to follow another site you generally do it with RSS. It’s the language of publishing platforms. You can do neat stuff with a single locus (like the social features on WordPress.com), but it’s not necessary for the ecosystem to function.
Social services like Twitter and Facebook are popular because they focus people’s attention in the same area. It’s a single place where people can find their friends and people they want to Internet-stalk, and that makes it easy to connect.
Pasting an Atom feed? It’s not going to work because that’s not the language of social services. You’ve already made it too hard.