I've been using Drupal for quite a while (since verion 4.x) both as a hobby and building websites for clients.
Most of the stuff I've done has been configuration of available modules coupled with my own personal module and theme tweaks, but never anything public to the community. Now I've decided to get more involved and am the co-maintainer (along with CrookedNumber) of a new kiva module that aims to integrate Drupal with the Kiva API.
Currently, we have a block module that can be configured to display loans based on settings the user provides as well as an add-on parser module to Feedapi (which I'm really excited about). We're still in the initial development stage, so if anyone has ideas or feature requests please let us know.
There is also a test site at kiva.crookednumber.com that is used as a sandbox for development features.