Hosting 3.0 is probably legal. 3.1 presents some problems because of the poor way that transfer of IP ownership was carried out.
But a real test of the 3.1 copyright would be hosting the 3.1 source files.
These used to be in the hands of a few people, but I'm not sure who would have them now.
Mind you, I don't think anyone that wants to design an Amigoid OS would download or examine these files (it would contaminate their own project), but it would nudge AInc. and Hyperion into action.