Adobe Buys Demdex. Adobe announced a big acquisition ; buying behavioral data bank DemDex. Terms of the deal were not disclosed in the release. Demdex captures behavioral data on behalf of Websites and advertisers and stores it in a “behavioral data bank.”

Atheros Acquired By Qualcomm For $3.1 Billion. San Jose-based networking equipment maker Atheros was acquired by mobile phone technology firm Qualcomm, in a deal worth $3.1 billion. According to Qualcomm, it is acquiring Atheros for $45 per share in cash, for an enterprise value of $3.1 billion, in a bid to expand its technologies and platforms beyond the cellular phone market. Via completed its Acquisition of Heroku, the enterprise cloud computing company acquired Heroku, the privately held cloud platform for writing Ruby-based applications.

YouSendIt acquired Attassa Inc. and Zosh. YouSendIt Inc. acquired e-mail collaboration and e-signature companies Attassa Inc. and Zosh.

Flock was acquired By Zynga Zynga acquired the social Web browser developer Flock for an undisclosed sum. Both Google and Twitter were also bidding on Flock.

Qik was acquired By Skype Redwood City-based Qik, which develops mobile video services,was acquired by Skype. Financial terms of the deal were not disclosed. Skype said the move will help its team to develop new and innovative products.

CloudMade bought German Mapping Firm CloudMade, a company that provides mapping data to 16,200 application developers was acquired German startup OneStepAhead.

TripIt Acquired By Concur. San Francisco-based TripIt, the mobile travel management software developer, was acquired by expense and travel management software firm Concur. The deal was worth $120M.

RockYou Buys Playdemic. Redwood City-based social games firm RockYou acquired Playdemic, a social games developer based in Manchester, England. Financial terms of the buy were not disclosed.

Zynga Buys Area/Code. San Francisco-based Zynga acquired Area/Code, a New York-based developer of social games. Financial terms of the buy were not disclosed.

Facebook bought stealth mobile advertising firm. Facebook acquired a stealthy, Seattle based mobile advertising startup, Rel8tion. Financial terms of the acquisition were not disclosed. Rel8tion was reportedly working on hyper-local mobile advertising services.

Google Buys Fflick. Google acquired fFlick, the operator of a Twitter driven movie recommendation service. The deal was reportedly worth around $10M. fFlick used Twitter to figure out what movies people were following.

SayNow Acquired By Google. SayNow, a developer of a voice messaging application aimed at celebrities and brands was acquired by Google. Financial terms of the buy were not disclosed.

LinkedIn Buys CardMunch. LinkedIn acquired business card scanning application CardMunch, and made the service free. Financial terms of the buy were not disclosed.

Cisco Buys Pari Networks. Cisco bought Milpitas-based Pari Networks, a developer of network configuration and change management software. Financial terms of the acquisition were not disclosed.