Highflying stream reader TweetDeck just raised a $3 million Series B round led by its biggest investor, betaworks. That brings the total capital raised by the company to $5.3 million. Ron Conway and Danny Rimer also invested in this round, as did all existing seed investors, including the Accelerator Group, Roger Ehrenberg, and Howard Lindzon.

TweetDeck is the most popular Twitter client by one estimate, with more than 15 million downloads so far. Over the past year, it has been moving beyond Twitter, adding streams from Facebook and MySpace. And just a few minutes ago, it released its latest update, which incorporates streams from Google Buzz, Foursqaure, and more. It is now truly a general stream reader.

TweetDeck is also working on an HTML5 Web browser version of its stream reader, which is currently an “internal research project,” according to CEO Iain Dodsworth.

Below is a video demo of the new TweetDeck features. Don’t you just love the way those Brits say “Google Buzz”? The best feature though has to be how easy TweetDeck makes it to do a fake check-in via Foursquare.

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• TWEETDECK
• BETAWORKS

Company: TweetDeck

Website: tweetdeck.com

Launch Date: July 4, 2008

Funding: $3.8M

TweetDeck is a Twitter client for desktop, web, and mobile devices. TweetDeck was originally an Adobe Air desktop application, designed with a unique columned user interface. Its goal was to be a realtime application that allowed users to monitor that information in a single concise view. TweetDeck integrated services from Twitter, Twitscoop, 12seconds, Stocktwits and Facebook. In 2011, Twitter acquired TweetDeck and rebuilt the application in HTML5.

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Company: betaworks

Website: betaworks.com

Launch Date: January 2007

Funding: $27.5M

betaworks believes in the power of the real-time social web. We believe that the popularity of the real-time and social aspects of the web represent a radical shift in how people use and interact with the Internet. The future is about dynamic streams of information, not static pages. It’s about push, not pull; it’s about enabling publishing tools and data; and it’s about the ways we touch, experience and interact with the Internet and each other. With this...

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