This might be a dum question but does cjb.net domains work with DNS? So can you alter the name servers for the domain? See I thought they were just redirects.
Login > Account Settings > Very bottom you can enter:
-Name Server 1
-Name Server 2 (they just added support for a secondary name server not to long ago)
They used to have all of that available when you signed up, but now they've sorta "hidden" it away. But I use a CJB.net domain here on my Astahost hosting account and it works just as well as a .com. Of course, it's blocked at school because it's a cjb.net domain, but it is still great!