After checking a few registrars, I found they only sell third-level domains (.com.ng, .net.ng), not second-level domains (like "amazi.ng") which is probably what most people here would be interested in.

Example: http://www.webdomains.com.ng/myaccount/whois.php?step=1

It's a shame they're missing the opportunity to sell such a nice top-level domain - or perhaps it's done on purpose?