First we saw changes to Facebook that made sharing more selective in a manner similar to Google+. Now Mashable is reporting on an experimental change in the news feed feature that lets you read and post more selectively.
One of the most interesting aspects of the revamped News Feed is the addition of Smart Lists. Smart Lists automatically sort your friends into a work list, a list for classmates and a list for friends who live within 50 miles of your city. This makes it easy to post updates just to your college friends or to talk about a local party with just your nearby friends.
Facebook has done stuff with lists before but it didn't really catch on because you had to proactively create them and it seemed like too much labor for too little reward. What's interesting here is that people are sorted automatically.