Tweetdeck, a London-based startup that builds software to consume rapidly updating information streams, has raised $3 million in funding in what is an internal round, according to John Borthwick, co-founder of Betaworks, a NY-based startup and investment group. Betaworks is a lead investor in the company started by Iain Dodsworth; other angel investors include Ron Conway of SV Angel, Howard Lindzon and Danny Rimer of Index Ventures.

With this Series B round of funding, the company has raised a total of $3.5 million, including $800,000 via a convertible note last year. TechCrunch reported that the company had raised a total of $5.3 million, but that figure is not correct, Borthwick told us. Like its rival Seesmic, Tweetdeck is desperately trying to move away from its reliance on Twitter, which has decided to compete with client-makers.

Tweetdeck (and Seesmic), which have embraced rapidly updating personal data streams such as Facebook, Google Buzz and Foursquare, are also looking to diversify beyond their desktop applications into mobile apps. Liz, who’s covering the Google I/O in San Francisco, spoke to one of the folks at the Tweetdeck booth there and learned that the company is working on synchronizing data and updates across many different services. It also announced an experimental HTML5 version, though it won’t be coming to a device near you anytime soon.

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