Google Refine in their own words is: "...a power tool for working with messy data, cleaning it up, transforming it from one format into another, extending it with web services, and linking it to databases like Freebase...."
Data transformation (and visualization) is an area that I'm very interested in, and this looks like a nice toolkit.
I wonder how they constrain, validate and sanitize 'potentially malicious' user data
