Harmonix has confirmed to Joystiq that Rock Band Unplugged has "run through [its] planned slate" of DLC. Following two weeks of Rock Band Unplugged DLC being absent from our Rock Band Weekly feature, we decided to check in with the developer to see if this was the end of the road for the portable rhythm game's downloadable track support.
Harmonix stated it is "very pleased with the performance of the Rock Band Unplugged game on PSP, the Rock Band PSP bundle and PSPgo starter kit" and appreciates Sony's support of the title, which currently has around 100 tracks via disc and DLC combined. The developer states that the DLC team is currently focused on the ambitious "Rock Band Network, weekly console DLC, and unannounced future projects." Harmonix isn't ruling out future Unplugged DLC, as it may be "part of event releases," but it appears that weekly updates are done for now.