Revolution press release: http://revolution.com/press-release/steve-case-ted-leonsis-and-donn-davis-close-450-million-commitments-revolution-growth
Revolution letter on the fund: http://www.revolution.com/our-investments/revolution-growth/letter
Dealbook article: http://dealbook.nytimes.com/2011/12/01/steve-case-raises-450-million-venture-fund/