Seattle-based Doxo, a stealth mode service which says its is developing solutions to an "age-old problem" addressing a "multi-billion dollar" business, has received $4.75M in a venture funding round which appears to be led by MDV Mohr Davidow Ventures. The funding came to light through a regulatory filing, which says the firm is targeting a $5.25M fundraising. MDV's David Feinleib is listed as a board member of the firm, which is headed by Stephen Shivers, formerly of OpenMarket, Qpass, and Infospace.