Another system of interest for your list would be the OKFN Global Open Data Index:
http://index.okfn.org/place/united-states/https://index.okfn.org/place/
It provides national and sub-national catalog listings and categorization for a variety of data types, and an assessment of how open each country is. Similar to the http://datacatalogs.orgDataPortals.org, and run by the same people.