First there was Answers, which let you post, & reply to, questions from other users. Then, after a redesign, came Groups and the ability to update your status.
Now LinkedIn has introduced Applications. This lets you embed applications along the same lines as Facebook. They are business-oriented; SlideShare, Company Buzz, and Huddle to name a few.
I've added SlideShare but I'm getting a lot of server errors when viewing which I'm hoping is down to volume at the moment.
It'll be interesting how far they go along this route and truly become a "Facebook for business".
Technorati tags: linkedin, applications, facebook, slideshare