Borderlands developer Gearbox revealed in a recent Steam announcement that the original title in the series will now be moving away from the defunct Gamespy, instead utilising Steamworks like its second in-line Borderlands 2. The move will allow everyone the chance to continue playing the game and its assorted DLC.
Alongside the Steamworks changes Gearbox also announced a much needed change that will surely appeal to everyone - Borderlands will no longer feature the rather draconian Securom in both the base game and its DLC. Steamwork integration has already begun with all available DLC having been imported over, making all DLC Steam compatible
Gearbox has also added in a 'Granting Tool' to Steam's Tools section, allowing retail users the ability to convert their disc into digital form, which should be handy for keeping track of all your content. You can read more about it in the Steam Announcement