What Happens When a Social Media Company Goes Public? Twitpics, Blog Posts and Trending Topics.

LinkedIn is notable for being the first major social networking company to go public, but it’s also one of the first companies to go public whose leaders are avid social networking users.

The business networking company had a stunning debut on the NYSE today, with early trading so far maintaining a doubling of its initial pricing.

Current and former LinkedIn employees and investors are jubilant, and seem to be bursting to talk about the IPO after a four-month quiet period. They’re sharing their IPO celebration with images and words posted mostly on Twitter.

LinkedIn has put up a blog post celebrating the four users it invited to the New York Stock Exchange this morning, and it’s retweeting other celebratory tweets from its official account.

Reid Hoffman, who owns 21 percent of LinkedIn, giving him about $1.7 billion of the company at today’s valuation, hasn’t updated his Twitter yet.