TweetDeck founder Iain Dodsworth has confirmed that Twitter has acquired his company. The deal was completed yesterday. TweetDeck started with one team member and one user to a team of 15 with millions of users. The TweetDeck team will remain in London. Previous investors in TweetDeck include Betaworks, TAG, SV Angel, and PROfounders. [TweetDeck Blog]

Twitter has closed the acquisition of TweetDeck according to a source with TechCrunch. Twitter is putting in between $40-$50 million in cash and Twitter stock to acquire TweetDeck. UberMedia was close to acquiring TweetDeck, but Twitter came in and made an unsolicited offer. Twitter did not want to allow UberMedia to have too much market share in Twitter-related applications and companies. [TechCrunch]

TweetDeck has totally revamped their iPhone application. Some of the new features include retina display, multi-tasking support, and new column features. The pinch gesture on the TweetDeck application now gives you an option to add any combination of your feeds into a column. Now Twitter timelines, DMs, favorites, mentions, lists, searches, and Facebook feeds can be combined into columns that you prefer. [iTunes link via TweetDeck Blog]

Earlier we believed that UberMedia had acquired TweetDeck for $30 million, but we stand corrected. Twitter is actually in advanced talks for acquiring TweetDeck for $50 million according to a source with The Wall Street Journal.

UberMedia is a company that is known for making popular applications that work with Twitter. However Twitter and UberMedia’s relationship with each other have been rocky. Therefore UberMedia is rumored to be working on a social network of their own.

Earlier this month, Chrysler fired their social media firm New Media Strategies because a tweet was sent out on behalf of the company that said “I find it ironic that Detroit is known as the #motorcity and yet no one here knows how to f**king [edited] drive.” This tweet was accidentally sent out by 28-year old Ferndale, Michigan resident Scott Bartosiewicz, who used TweetDeck as his default Twitter client.

UberMedia has raised $17.5 million in a round of funding led by Accel Partners with participation from Index Ventures and Revolution Ventures. This puts UberMedia’s valuation at about $40 million. Index Ventures. Over the weekend, Ubermedia also acquired TweetDeck for $30 million in cash and equity. UberMedia head Bill Gross and TweetDeck founder Iain Dodsworth are focused on building businesses within the Twitter ecosystem. Jim Breyer of Accel will be joining the UberMedia board of directors. Below is the funding press release:

TweetDeck is testing out a new service that would extend beyond Twitter’s 140 character limitation called Deck.ly. This is interesting because Twitter has been filling in holes in their services over the last year by creating products which would directly compete with third parties. Now TweetDeck is working filling in a hole that Twitter has in their whole business model.