Replaces everything after the enacting clause. Amends the Illinois Public Aid Code. In provisions concerning the Department of Public Aid's data warehouse concerning medical and related services, provides that the Department shall perform all necessary administrative functions to expand its linearly-scalable data warehouse to encompass other healthcare data sources at both the Department of Human Services and the Department of Public Health. Provides that the Department shall leverage the inherent capabilities of the data warehouse to accomplish this expansion with marginal additional technical administration. Provides that the purpose of this expansion is to allow for programmatic review and analysis including the interrelatedness among the various healthcare programs in order to ascertain effectiveness toward, and ultimate impact on, clients. Provides that beginning July 1, 2005, the Department shall supply quarterly reports to the Commission on Government Forecasting and Accountability detailing progress toward this mandate. Creates the Data Warehouse Inter-Agency Coordination of Client Care Task Force to gather information and make recommendations relating to: (1) the most effective flow of information between agencies that serve the same clients through one-stop shopping across State government; (2) the creation of an overarching system to respond to requests by the General Assembly, the Office of the Governor, and the general public; and (3) the most effective use of State moneys in leveraging the current system to accommodate the ever-growing information base in State government. Requires the task force to report by December 31, 2005, and repeals the task force provisions on January 1, 2006. Effective immediately.