I remembered that someone, somewhere, was advertising a Shimano IGH quick release but internet searches yielded nothing. Then it occurred to me that I had indeed seen such a thing on the Dynamic Tempo 8, a shaft drive Shimano IGH.
http://www.dynamicbicycles.com/bicycles/tempo8.php
There's an array of photos at the bottom. On the bottom row second to the left is thumbnail of the QR.
I'm sure they were selling the QR separately but I can't seem to find any info about them now. Either way, if they work on a Dynamic shaft frame they should work on others.
http://www.dynamicbicycles.com/image...ackSDTS_lg.jpg