Indiana
There is also a collection of Miscellaneous Records, which should not be overlooked, as they contain records of two groups of people often neglected in historical archives -- children, and African Americans. There are also some public land and court records included here. The Indiana Archives People Search tool will be very valuable for genealogists, and anyone else looking for historical information on individuals. Results typically show a summary record for an individual, but do not (yet) provide actual images of the original record.
The Detailed Search will allow you to zero in on individual collections and records by county, date, etc. There is also a Keyword Search at the Archives, but this was not enabled when I visited.
Working with the Library at Indiana University, the Archives have also made available an interesting "Telegraph Collection" of Civil War era telegrams from the Governor's office.
These are part of the more general Indiana University Library Digital Collections which include a number of interesting collections on Indiana history:
By the way, here's the official page for the Indiana State Archives with information about their offline collections, as well as a convenient summary of their Online Indexes.
Now, if only I could figure out what a Hoosier is...!
More historical archives and research materials can be found at these excellent resources: