I've start familiar with Couch DB while being working on CMS DAS project. We use Couch DB as one of the cache back-ends. The information coming out from different data-service were stored into Couch DB and being updated periodically via lazy-query approach. We designed DAS Query Language which users used to access their data. While working with couch we realized that we need CLI admin tool. I took ipython as a ground and build for it a plugable interface to access couch DB. You can download it from here