Own a piece of black history
I have to say, this site is an example of "form and function." Dayinblackhistory.com not only looks good, but it's one of the few black history sites that have a social twist to it. Members can "adopt" existing historical articles, post new ones, vote on them, comment on them, vote in polls.
I think there's a year-end reward for the most active users, but they seem to keep the prize secret.
I've adopted and posted some articles up there myself. I figure i'd let you bros and sistas know about it.