don't you think it's a rather gutsy move for a commercial business to stick its neck out like this?
Completely stupid of them would be a more accurate phrase. This was discussed at length here, and it most certainly does not mean that Abandonware is legal.
The ruling in question is actually not a new one at all. It's a renewal of one from three years ago, designed specifically to allow The Library Of Congress and other archival institututions to archive software for the preservation of social history and for the study and education of future generations.
It gives a right to circumvent copy protection, it does not grant or give ANY right to actually copy or distribute the software.
Best Regards,
Julian (Fozzy The Bear)