Looking at the statistics now available on drupal.org. I maintain 5 modules in the top 20 list. Excluding my core contributions, code I have written is deployed on almost 1/2 of all drupal sites participating in the statistics collection.
Somehow that makes me feel both good and bad… I wish I had a benefactor to let me work on my Drupal specific projects without having to focus on client specific implementations… wink wink
I hope my resource and stream wrapper work is as successful as the cck, filefield, imagefield, imagecache, and imageapi work I have done in the past.