Intel Capital's investment is part of $30m round for Kno, which also sees Advance Publications join the consortium as a new investor.

Japan-based internet holding company Softbank led the A round for SocialFlow, and the consortium also included SocialFlow's incubator, Betaworks and AOL Ventures, the corporate venturing unit of US media group AOL.

The other investors include venture capital firms IA Ventures and Social Leverage, and angel investors.

JumpTap raises $20m of a planned $27.9m round.

In September mobile phone maker Nokia's corporate venturing division led the previous $10m series B round for Rocket Fuel, and was joined by Northgate, Mohr Davidow and Labrador.

Berg Enterprises backs GoldSpot Media, a US-based video advertising services company.

Japan's CyberAgent will open an office in Taiwan in June. According to news provider Nikkei, CyberAgent will invest $120m in start-ups operating in China and Taiwan this year.

Venture capital firm New Enterprise Associates (NEA) led the $30m C round for TidalTV, and was joined by fellow reinvesting VC firm Valhalla Partners and Comcast Interactive Capital, the corporate venturing unit of local cable company Comcast.

SalesForce is paying $276m in cash and $50m in its shares for Radian6. A further $10m in stock and $4m in cash will be issued to founders and will be subject to vesting conditions over two years.

News provider FusionDiginet said Tony Langham, chief executive of Lansons, would join Cubaka's board and the portfolio company would relocate to Lansons' offices but maintain its independent branding.