How fast does energy transfer along a conjugated polymer chain, and how fast between chains? A semiconducting polymer/mesoporous silica composite, which provides just enough space for one polymer chain per pore, provides the answer through investigations of the polymer's luminescence anisotropy. T.-Q. Nguyen received second prize for this work in the Advanced Materials Innovation Competition at the ICSM 2000 (see Adv. Mater 2000, 12, 1563 for details).