I am working with the IIUG to begin the development of an "Indiana-area Informix User Group" currently. We have quite a few Informix users in Indiana, and many more in Ohio and Kentucky that could benefit from an active group in Indiana. Xtivia has two full-time Informix staff based in Indiana now (myself in Muncie, and John Catmull in Indianapolis), so we should have plenty of great technical topics in hand.
Stay tuned for the announcement of the Indiana group. If you would like to be notified when the group is formed, please email me at firstname.lastname@example.org.