Santa Monica-based Demand Media, the online publishing firm headed by Richard Rosenblatt, has updated its S-1 filing, saying it now has around 3 million articles in the firm's library of content. Demand Media has applied to list on the NYSE as DMD, but has not yet set an offering range or pricing on its IPO. Demand Media filed for an IPO in August. Demand operates Livestrong.com, eHow.com, and other web properties.