I have been working on Drupal 7 sites for a while now, mostly on research projects. I like a lot of the D7 features, and think it is a big step forward over Drupal 6, which wasn't bad to begin with. Most of my work on D7 won’t have modules which will go on Drupal.org, being 'closed' or at least too specific. So I was pleasantly surprised when I was working on a side project to see an opportunity to give a little code back.