This is the latest edition of the "State of the States in Developmental Disabilities" study--a thorough and the only one of its kind investigation on public spending, revenues, and programmatic trends of intellectual and developmental programs and services within the United States since 1977. Directed by leading researcher, Dr. David Braddock, the study serves as a goldmine of information on trends and analyses of developmental disability services--from comparative spending on the HCBS Waiver, ICF/MR and related Medicaid programs, to the number of participants in the supported living and personal assistance programs in each state. This edition contains: (1) data on public spending and services for intellectual and developmental disabilities from 2004-2006, with cumulative data spanning a 30-year period from 1997-2006; (2) a 100-page detailed narrative analysis on: trends in spending; Community services and supports; public and private institutions; fiscal efforts in the states; and demand for services and supports; (3) four-page graphic profiles on each U.S. state and the District of Columbia on trends in spending; trends in revenue; trends in residential services; and individual and family support; (4) summary reflections of authors on slowing spending due to inflation; contraction of public and private institutions; expansion of community services; Medicaid and HCSB Waiver; fiscal efforts of states; and challenges ahead; and (5) update on the United Nations Disability Rights Convention. This monograph divides into two parts and four sections. Part I, "The State of the States in Developmental Disabilities: 2008," contains sections (1) Introduction; (2) Approach; (3) National Trends in Spending; (4) Community Services and Supports; (5) Public and Private Institutions; (6) Fiscal Effort in the States; (7) Demand for Services and Supports; and (8) Summary and Conclusion. Part II contains state profiles. (Contains 22 tables and 28 figures.) [For "The State of the States in Developmental Disabilities. Fifth Edition" (1998), see ED420126.]