UPDATE: Temporary workaround while GIC maps are down
While we are working to restore map and tile access on our production systems, we have worked with ESRI to get a temporary workaround in place on ARC GIS Online. you can access 8 blocks of data at this location: 
http://www.arcgis.com/home/group.html?id=854093e7f66541b6ba9a95ea91190db9

Scroll down to latest content, click on the Area of Interest you would like to access, and open the map viewer.

We will continue to work on restoring access with updates to follow on the blog and Twitter.
Questions about GIC Membership? We'd love to hear from you!