Communication between players should be the most important, most MMO have a forum like this with that soul purpose. wether it be from buy/sell, asking question. or just general chatting. It's also one of the main features of mmo's that you get to play with large groups of people so catering to that should be important.
The only part I find a tad odd is the need for black face makeup, why not just use you know..black people if they understand the culture/were born there I'm sure it wouldn't be to hard to find some that are willing.