Latest release is Google Refine 2.5. OpenRefine beta candidate available and moving forward the project is independent of Google.
Documentation and downloads available from the Open Refine website.
A useful tool in the ongoing work to move from strings to things.
>OpenRefine (ex-Google Refine) is a powerful tool for working with messy data, cleaning it, transforming it from one format into another, extending it with web services, and linking it to databases like Freebase.