Google have announced that, following their acquisiton of Metaweb in July, Freebase Gridworks has been renamed to Google Refine. Google Refine is an open source product for cleaning data sets, transforming them from one format into another, and extending them with new data from external sevices, and version 2.0 is out now. This version brings a new extensions architecture and a framework for linking records to other databases. There is also a new Json importer and added support for ignoring quotation marks in the CSV and TSV importers.