Must check out this link.  Digitalkoot is using game mechanics to crowdsource ‘editors’ to help discover and correct errors that occur during the process of indexing the Library of Finland’s archives.  

From the website:

 

Digitalkoot is a joint project run by the National Library of Finland and Microtask. Our goal is to index the library’s enormous archives so that they are searchable on the Internet. This will enable everyone to easily access our cultural heritage.

You can help us by playing games.

Playing games in Digitalkoot fixes mistakes in our index of old Finnish newspapers. This greatly increases the accuracy of text-based searches of the newspaper archives.