I have started an Agile Data Management group on Yahoo. It's at http://tech.groups.yahoo.com/group/agile-datamgmt/
This group is for the discussion of all aspects of applying Agile principles and practices to data management projects. It is intended to compliment the existing Agile Databases group and the key distinction between them is that this group covers situations where working with raw data is the primary focus of the project or application. For example, data warehousing, data migration, data cleansing and operational data transformations.
The focus of the group is wide ranging covering both technical and management topics and is open to everyone from novices to experienced practitioners.