Many Eyes is an IBM site for shared visualization and discovery. If you get an account you can upload data sets and then try different visualization tools on them. Others can create visualizations from your dataset and/or can leave comments on a visualization. See for example this visualization of bible names.
Many Eyes is a bet on the power of human visual intelligence to find patterns. Our goal is to “democratize” visualization and to enable a new social kind of data analysis. Jump right to our visualizations now, take a tour, or read on for a leisurely explanation of the project. (From About Many Eyes)
What is interesting is the “democratic” nature of the site – a sort of Flickr for visualization.
Thanks to Judith for pointing me to this.