Los Angeles-based Sometrics said Monday that the firm has officially launched a new product, Social Ad Manager, which the firm says is designed to help developers and social networking sites optimize their advertising inventory. According to Sometrics, the new tool aggregates both third party advertising and a publisher's own ad inventory, and allows developers and social networking sites to manage that inventory. Sometrics said the software creates custom traffic reports and allows publishers to target inventory based on user demographics and social interests. The software has been available in beta since the beginning of June. Sometrics is venture backed by The mail Room Fund, AT&T, and Greycroft Partners.