A number of new features were announced yesterday at Facebook’s F8 developer conference in San Francisco. The most notable of these include the following social plugins:

1. The new “Like” button, which will be implemented on external sites across the web, including, for now, NYTimes.com, IMDb, CNN.com, TIME.com, LIFE.com, Fandango, NHL.com, USA Networks, Levis.com, Univision and ABC.com. When the user “likes” a product or article on one of these sites, that action will be shared with their friends on Facebook, and their friends will be able to comment on it there. In some cases, such as with IMDb, an item that is “liked” will be added to the user’s profile page under their interests. The item – in this case a movie – will then be able to send the user updates through their News Feed on Facebook.

2. Working alongside the new Like button, the Activity Feed surfaces the actions a user’s friends are taking on a website. If a user is logged into Facebook and then visits a site with this feature implemented, they will be able to see the articles and topics on the site that their friends are sharing, recommending and commenting on.

3. The Recommendations feature will highlight the content on the external site that is most popular with Facebook users, based on the number of “likes” each item receives.

Facebook, the fast-growing free-access social networking website, has obtained a $6.5-billion valuation for its common shares.

There’s a catch though! This development, which stresses the website’s high ranking among the giants in the technology and media sector, follows Digital Sky Technologies, of Russia, agreeing to pay $14.77 a share for Facebook common stock. Now, the Russian company’s stake in Facebook will be 3.5%.

The deal shows that Facebook has a higher market value than many other established media and technology companies that make considerably more money. While CBS Corporation, which earned $13.95 billion in revenues in 2008, has a market capitalization of $4.06 billion, Salesforce.com has a market cap of $4.72 billion.

According to Mark Andreessen, board member, Facebook is expected to exceed $500 million in sales in 2009.

As of today Facebook has reached 250 million active users on its social network – up from 100 million nearly a year ago – thus ranking higher than the rival social networking website MySpace.

So how about, would you like to own stock in Facebook?

Image courtesy of LaughingSquid