With mobile advertising starting to come into its own, Rhythm NewMedia has raised another big round to support the sudden demand from big marketers. The Mountain View, CA-based company, which specializes in mobile video advertising, has raised a $10 million third round from previous backers Lightspeed Venture Partners, Morgenthaler Ventures…

Here’s another sign of how much promise investors think there is in the group-buying market: LivingSocial, which runs a group-buying service, has raised $14 million in a third round of funding, only a month-and-a-half after raising a $25 million second round. The company also has several social apps, including its…

Automagically, Ning‘s still binging on money: The social-network-in-a-box startup founded by Marc Andresseen and current CEO Gina Bianchini, has raised another $15 million, at a crazy $750 million valuation in its fifth round, from Lightspeed Venture Partners, reports Kara. This comes after it raised a $60 million round (at $500…

Outbrain, a blog and news recommendation engine, has raised $12 million in a second round of funding. New investor Carmel Ventures led the financing, with participation from previous backers Gemini Israel Funds, Lightspeed Venture Partners and GlenRock Israel. The NY-based startup has raised $18 million in total, per CenterNetworks. Fellow…

Search technology company Kosmix has picked up a big $20 million in a fourth round of funding led by *Time Warner* Investments. Existing backers Accel Partners, Lightspeed Venture Partners and DAG Ventures also participated in the round, and interestingly, former *Motorola* CEO Ed Zander joining as a private investor. Mountain…

Social gaming site Casual Collective has picked up $1 million from Lightspeed Venture Partners in its first round of funding. Founded in 2007 and launched in stealth mode in December, it relaunched today with a slew of new social-media features and games, Gamasutra reports. Founders Paul Preece and David Scott…

Greentech Media, the online environmental news and research outfit, has raised $2.75 million in a second round funding. New backers Egora Holding and The Massachusetts Green Energy Fund co-led the round. Previous investors Lightspeed Venture Partners and Northport Private Equity also participated, along with another new backer, King Hill Capital.…

Serious Business, the developer of the “Sell Your Friends” app on Facebook, has raised a $4 million first round from Lightspeed Ventures. The popular app claims over 600,000 daily active users, although, just on a personal note, if you invite me to play, I will block you for good. This…

So Flixster finally decided not to sell (or, that no one was willing to pay its blue-sky valuation hopes): the movie-based social service that’s popular on Facebook, has raised $5 million of a planned $8 million second round according to peHUB. The round was led by Pinnacle Ventures, with participation…

SF-based Tippit, an online trade media firm, has raised a $12.17 million third round led by Granite Global Ventures, reports PE Hub. Also participating were return backers Lightspeed Venture Partners and Trinity Ventures. The company has reportedly raised $11 million prior to this, bringing its total to over $23 million.…

NYC-based Outbrain, a startup that lets users rate and receive blog recommendations, has raised a $5 million first round Gemini Israel Funds, Lightspeed Venture Partners, and GlenRock Israel, which has previously provided backing to the company. The company, founded by Yaron Galai, the co-founder of Quigo (sold to AOL), offers…