FamilySearch, the genealogy records arm of the Church of Jesus Christ of Latter-day Saints, is busy scanning and indexing the bulk of their 2.6 million reels of microfilm.
The indexing process is a collaborative “crowd sourcing” web project, involving the genealogical community. In fact, since May, the FamilySearch website has released digitized and crowd-source indexed genealogical records containing 500 million names on their beta website: http://beta.familysearch.org/.
Indexing is done through a double-blind process, where two indexers independently fill out forms with the index information. The indexed values are compared, and when they match completely, they are accepted. When there is a discrepancy between two index entries, they are sent for arbitration. Additionally, if users pass over records without indexing the, FamilySearch looks at the images to determine if they might need to be scanned again.
If you are interested in paricipating, see http://indexing.fsbeta.familysearch.org/
For more information, read the FAQ: http://indexing.familysearch.org/support/faq.jsf