Filamentary, my dear Watson

Developments that took place in the area of sculptured--thin--film technology after {\em Bianisotropics '98\/} are reviewed here. Devices addressed include: optical filters of various kinds, laser mirrors, gas--concentration sensors, optical interconnects, interlayer dielectrics, and biosensors. Pulse bleeding is related to the circular Bragg phenomenon in chiral sculptured thin films. Acoustic research is also identified.