If you’re at FOSS4G 2014, be sure to check pycsw in the following presentations and workshops:
Data.gov/Geoplatform.gov CSW implementation through pycsw and CKAN integration given by Angelos (Thursday 11 September, Session 2, Track 1), which will discuss the implementation of the CSW endpoint using pycsw within the Data.gov infrastructure (architecture/enhancements/testing/deployment) and CKAN, which powers Data.gov and Geoplatform.gov
GeoNode has various presentations and workshops (GeoNode is powered by pycsw for CSW by default)