The word 'nigga' has been around for sometime now in our daily lingo, and from what I understand, it's okay for people of the African American community to use it within, but it's extremely offensive for an outsider to say so (as outlined here).
Recently, I have come across a new colloquialism called 'nibba', which is apparently a better version of it's 'g' counterpart, and can be used by an outsider as well.
How did this new form originate, and is it really true that it's more acceptable?
Is 'nigga' still that offensive, or has it become much more easier to employ?