Last week, shares of LinkedIn more than doubled during the first day of trading.

Those of us working the PR Daily desk are no financial gurus, but even we could tell you that sounds good. (It is good, right?)

You’re more than likely on the site, but how much do you know about LinkedIn?

Here’s a little something for you: Executives from every Fortune 500 could be found on LinkedIn in 2010.

That factoid, and so much more in this infographic: