We've heard talk about changes for a while at LinkedIn, when I logged in today the facebook-style changes had gone into overdrive. Found myself a bit confused about navigation at first.
There's more focus on the newsfeed and the q&a element, and even a status update (what are you working on?... answer 'connections'... though I found it horrible to use).
I like the new encouragement to self-form groups. But as colleague BadgerGravling pointed out - how do you find them? Take a look for yourself.