Linked In has improved amazingly in the last 12 months since the threat of Facebook I suppose they had to.
Company Profile

I love the way that they have introduced a facility to
which provides lots and I mean lots of information on the company that an individual works for. It shows
- a company summary,
- a list of employees who are in your network,
- popular linked in people
- related companies
- top job titles
- top universities
Unlike Facebook Linked In in the professional context becomes more and more useful the more you use it. They only add functionality if it is to be useful to the users.
I found my most recent role via a cold email after searching linked in by my geographical area, fantastic result.
How do you use Linked In?