i.e. having registered example.com with NC, can you set up ns1.example.com to be the nameserver for example.com free of charge? Many registrars charge a fee for this (when they really shouldn't)
EDIT
Seriously? Downvotes? It's just a question. There WAS a company that does that, it was mentioned here on HN during the great GoDaddy exodus, but I cannot recall which.