Originally in Area51 the proposal was for Bitcoin, but then it was suggested to enlarge the scope to all crypto-currencies. This idea seemed to have gained some traction, and the name and description of the proposal were changed accordingly.
However, it seems that a mere hours before the private beta launched, the name of the proposal was shortened and the description was changed to remove references to other crypto-currencies. I'm not sure if that was really the intent of those last-minute changes to the proposal.
So would a question about Namecoin, for instance, be on-topic?