Found the problem. The issue was that my system was pointing to a down-level license file. Until I upgraded to a v13-compatible license file, the devices were not available even though the device files were properly installed. Once I up-leveled my license file, everything was fine.
The interesting thing is that Q 13.0 (SP1) came alive and allowed me to open and use Qsys... I didn't even notice the problem until I tried to build the sopc system. When the build didn't work, my first thought was that I hadn't assigned a device and that might be why the build failed. It was when I went to assign a device to the project that I noticed no devices (in any family) were available.
