Redpoint Ventures, the VC firm that has backed a long list of digital media companies, including in recent months ad provider Impact Radius and video search engine Clicker, has closed a new $400 million fund. The cash will be used to invest in early stage “social and mobile internet, cloud computing and clean technology” firms, according to a press release. This is 11-year-old Redpoint’s fourth fund and comes as the VC firm has had some big exits lately; Redpoint says that in the past six months alone four of its portfolio companies have been acquired, one has IPOed, and two have filed to go public.