Mashable - Bob Al-Greene
Hot Social Networks to Watch 1. Medium 2. Kleek 3. Viddy 4. RunKeeper 5. Ghost 6. Pose 7. Vine 8. Atmospheir 9. Days 10. App.net Have you ever dropped into Facebook to check your news feed, only to be amazed how many unfamiliar names fill your screen? Lab partners from seventh grade, friends' parents; it's …