The Iconfactory today announced two new add-on sets for its Porcelain stock icon series. Porcelain: Database Add-On is an extension of the original stock icon set and includes icons covering such specialized concepts as tables, scripts, records, and many others. Porcelain: Multimedia is a set of add-ons that extends the original collection into the audio & visual realm with icons covering concepts such as mixing, effects, video and many others. Porcelain Database & Multimedia each contain 52 unique icons in multiple sizes and formats. Each set sells for US$179.