Adaptly is a social ad buying company that has raised $2.7 million in Series A funding from First Round Capital, Charles River Ventures, Kirschenbaum Bond Senecal & Partners, and Lerer Ventures. Some of the angel investors involved in this round include Gary Vaynerchuk, Nathaniel Turner (Invite Media founder), and Michael Katz (Interclick CEO).

Real estate search engine company Zillow.com has filed an S-1, which means that the company is going public on the stock market. Zillow is aiming to raise $51.75 million. Currently this is a placeholder amount and is subject to change.

Facebook has launched a community website for ad agencies and brand managers to exchange ideas called Facebook-Studio.com. Executives at Facebook said that launching this website is a first step for a give-and-take dialogue between Facebook and ad agencies.

MindJolt is a gaming company that is run by MySpace co-founder Chris DeWolfe. DeWolfe left MySpace a few years after News Corporation acquired the social network company.

Wal-Mart Stores, Inc. (NYSE:WMT) has acquired Kosmix for over $300 million according to a source with AllThingsD. Kosmix is a social media platform company that has raised $55 million in funding from Time Warner Investments, Accel Partners, Lightspeed Venture Partners, DAG Ventures, Bezos Expeditions, Jonathan Miller, and Ed Zander.

Dropbox is a file storage service that was founded in 2007 by Drew Houston and Arash Ferdowski. Dropbox was one of the earliest Y Combinator incubator companies. Dropbox has 25 million users and is seeing about 200 million files saved per day. Over 1 million files are being saved every 5 minutes. About a year ago Dropbox had 4 million users and two years ago they had 2 million in late 2009.

Apple Inc. (NASDAQ:AAPL) is suing Samsung over patent infringement. Apple alleges that the Samsung Galaxy phone and tablets are in violation of Apple’s patents, trademarks, and is unfair competition. The lawsuit was filed in the U.S. District Court in Northern California. Apple wants injunctions, actual damages, and punitive damages.

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.