Tracking usage of OpenLP is incredibly difficult. Because it is an open source project, there are no registrations to check, you don't know how many times OpenLP has been copied and given to other people. So we don't ever have a true idea of how many churches are using OpenLP.
Tracking downloads is also quite difficult due to OpenLP being available in a number of distribution channels. We know roughly how many downloads there are of the Windows and OS X versions because most folks just download them from our SourceForge.net mirrors. There are a couple of BitTorrent downloads, which we cannot track, but it is such a small download that most folks just do a direct download.
Tracking downloads for the various Linux distributions is far tricker, as there are no download statistics available. We cannot retrieve any number from FreeBSD, Fedora, Ubuntu, Debian or Arch. Having said that, we do have a PPA (Personal Package Archive) on Launchpad.net for our Ubuntu users, and we are able to track those downloads.
So, using the data we do have available to us, we can surmise that as of the time of posting, OpenLP 2.0.1 has been downloaded 43,781 times. That's over forty thousand times! The real figure is probably a lot higher, thanks to the downloads we can't track, but this still gives us a rough idea of the impact of OpenLP.
If you haven't downloaded OpenLP yet, DO IT NOW!