Digital Lifestyle Outfitters (DLO) today announced new versions of its popular iPod cases for fourth-generation (4G) models. The updated DLO Jam Jacket and the DLO Jam Jacket Pro sport new colors and feature new and improved designs. The new versions of the DLO Action Jacket workout case, leather Podfolio and Executive Podfolio, as well as the DLO Podsling are also available for pre-order. All of the new DLO cases will be shipping by the last week of September.