LinkedIn has recently made a number of changes to make the LinkedIn experience more social and to drive more engagement. The changes include Facebook like alerts for comments and likes on a specific activity. Comments and activity beyond your 1st level LinkedIn connections can now occur.
Essentially LinkedIn has taken Facebook like interaction, added it to Twitter like collaboration and brought it to a verified business network. I think this has the potential to really shake up Social interaction and may drive increased LinkedIn networking and collaboration. What do you think? You can see an example below