According to this post on the DearMYRTLE blog, FamilySearch is reporting that 34,000 people have signed up to help index the 1940 census when it is released to the public next week. The blog post also gives information about webinars that will be held each night next week at RootsMagic so indexers can get together and share any problems, insights, etc. they are experiencing.
The Indiana Genealogical Society is part of this indexing project. To learn more about how you can participate in this collaboration by the genealogy community, visit http://www.indgensoc.org/projects/1940_census.php