I was at the DevSummit and saw the newest Open Data Portal.
In 3 short weeks, I created our site for the County.
I called it GeoDat.
Jeff Utter GISP
County of Kern, CA
We have added many new feature to our Open Data Portal - Geodat, https://geodat-kernco.opendata.arcgis.com/
Check them out and please provide us feedback.