Path is a mobile-only social networking app that has no desktop version; their only clients are IOS and Android apps, at least for now. Unlike Facebook, it is designed to share personal information with a small group of friends, so by design it's a lot more private in its' treatment of your postings. (But I don't doubt that the developers have a way to make money - and rightly so.)
Although I use MojoWhatsup to keep in touch with my international friends, I have to admit that I see the appeal of a tighter social network. Path apparently limits your network to 150 friends, and most limit their network to 40 to 50 of their closest friends and family members. Is anyone else interested in a Path client for WebOS?
Nice writeup: gigaom.com/2012/11/01/path-targets-its-family-audience-with-new-ipad-app-and-landscape-mode/