Archives of Pediatrics & Adolescent Medicine will devote its April 2008 theme issue to articles that apply rigorous science to the many aspects of sleep medicine as it concerns children and adolescents. To ensure the best chance of inclusion in this theme issue, authors should submit manuscripts by September 1, 2007. Guidelines on preparation of manuscripts and submission can be found at http://archpedi.ama-assn.org/misc/ifora.dtl.