Our OJS tracker has found at least 6600 installations from around the world as of this month:

OJS          Date
2465       01/01/2009
3216       01/04/2009
4096       01/07/2009
4641       01/10/2009
5166       01/01/2010
5705       01/04/2010
6630       01/07/2010

Some of these are traditional scholarly journals, but we've discovered that OJS is being used in many unexpected ways, too. Some of these 6600 include conference proceedings, reports, learning management systems, monographs, and more. Some will publish on a regular schedule, and others may only publish a single issue. While this may fall outside of what we consider a "journal" to be, it is very exciting to see OJS contributing to an expansion of available scholarship and knowledge.