Who's making good use out of Linkedin?

I’ve been signed up with Linkedin for some time now but I must admit I do nothing with it besides accept networking requests.

Anybody doing any thing special with Linkedin above and beyond what can be achieved with Facebook and forums like WCR?

I think it is the Facebook of the business world. I am on there, but haven’t seen much use in it yet, although i haven’t made any really good business use out of Facebook either…