A new GIS service is available for Rockingham County -- bookmark it now -- http://rockingham.interactivegis.com.

Per Rockingham County....

The increase in performance and stability along with new functionality will enhance user ability to interact and navigate inside the County map, obtaining data related to specific interests at a more efficient rate.

I have explored a bit, and it does seem to be an improvement over the old GIS, and it even has a mobile site! 

Rockingham County GIS