There are many services that syndicate blogs to social networks, ie automatically post links to new blog posts. TwitterFeed, dlvr.it, OnlyWire, and IFTTT are some of the best known.
I haven't found any syndication service that can automatically attach locations and people to those syndicated posts, though, using mechanisms like check-ins and @-replies. That's probably because the few ways to include places or people in RSS feeds (GeoRSS, OStatus, etc.) aren't widely supported.
Still, I wish this existed. Does anyone know of a syndication service that can attach locations and people to its posts, using the native functionality in each social network? I'm mainly interested in Facebook, Twitter, and Google+.