A treasure-trove of data and information on our state court systems is contained in the recently-released State Court Organization, 2004. Moreover, the Bureau of Justice Statistics (BJS) makes available much of the source-data in user-friendly formats.
According to the good folks at BJS, the publication "presents detailed comparative data by State trial and appellate courts in the United States. Topics covered include: the number of courts and judges; process for judicial selection; governance of court systems, including judicial funding, administration, staffing, and procedures; jury qualifications and verdict rules; and processing and sentencing procedures for criminal cases. Diagrams of court structure summarize the key features of each State's court organization."