I know you can have an end host connected to a vPC domain and run FCoE - and Im sure even then there are limitations...but what about FCoE between a blade switch (IBMs Cisco 4000 or the Cisco 2000 FEX blade that HP now has) and a Nexus vPC domain - is that a supported topology?
I would think this is a hot topic and that Cisco folks would be jumping all over this. :-)