I've never known anyone who celebrated it... and I think the Boondocks comic strip commented on that fact very well (Huey was always commenting after the fact that he forgot to celebrate). While some in the black community embraced the idea, most of them didn't... and since it takes a community to sustain a holiday, even those who would be inclined to back it wouldn't have the support to do so.
It'd probably actually do better if it was at a different time of year, too, since there's some other holiday people celebrate around that time that has less to do with heritage and more to do with consumerism (and, at this point, virtually nothing to do with religious views).
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"Principally I hate and detest the animal called man, although I heartily love John, Peter, Thomas and so forth" - Jonathan Swift
BT with the victory!