National Community Antidrug Coalition Institute Act of 2000 - Authorizes the Director of the Office of National Drug Control Policy to make grants to an organization to provide for the establishment of a National Community Antidrug Coalition Institute that will: (1) provide education, training, and technical assistance for coalition leaders and community teams; (2) conduct research, testing, and diffusion of tools, mechanisms, and measures to better evaluate and document coalition performance measures and outcomes; and (3) bridge the gap between research and practice by translating knowledge from research into practical information. Authorizes appropriations.