We would love to do that at some point. There is tons of open data out there, but not a lot of it has useful descriptions at the field level (only the dataset level), so it would take some time to put a collection together that is robust. Also the demo on our splash page is a demo of the artifact we create (i.e. the published dictionary) only. The other side of the web app is a management layer to bundle datasets into collections, annotate fields, configure sample sets, and share the artifacts. We'll work on fleshing out our demo to show what the system looks like when there are hundreds or thousands of datasets.