IMO? Not much.
I think the black community, in general, tends to be excruciatingly conservative - at least socially and culturally. In Detroit there was a coalition of black pastors who attempted (and failed miserably) to rally their congregations to vote for Bush on the basis of “family values.” In my opinion, if Christianity did not persist after the Civil Right’s Movement in the black community, the community would be far better off today. Just my opinion though so please don’t take it as the gospel or something. 
Ok! With that said . . .
Many black gay men are ostracized by their families and ridiculed in the churches. The only way for black gays to attain a parody of a relationship with other similarly identifying men is to participate in clandestine (and, unfortunately, sometimes unprotected) acts of gratuitious sex. Because the black community does not approve of a loving relationship between two men, black gays are usually torn between a very religious upbringing and persistent feelings of “debauchery” that won’t go away. If the black community DID approve, or at least tolerated it, black LGBT’s would more apt to form open and stable relationships with one another.
In general, the black community is scared shitless (can I say “shitless” here?). It goes something like this:
Strike One: You have an explosion of married black women who are contracting HIV after having sex with their spouse.
Strike Two: Because black men, in general, are masculine uber alles, it is virtually impossible to “out” them.
Strike Three: Being “DL” is no longer a survival mechanism it has become an entire culture in itself.
After all, given the data, the black community already knows that gays will marry just to be accepted into the community. This leads to accusations against black men who don’t display the perfect paradigm of masculinity. I have friends, for example, who are convinced Star Jones’ husband is gay for no other reason than his diction.
As a Detroit citizen (I’m only in Ann Arbor for school) I can attest to the fact that STD prevention programs were non-existent during my school years; however, my gut cannot shake the feeling that the culture is, at least, 75-80% to blame for the rise of HIV.
I hope that answered your question. I think I rambled. 