No kidding. The point remains, you're not going to find another segment of American society that's safer to recieve blood from than the U.S. military, regardless of sexual preference. I'm very ambivalent about having gays in the military, but the HIV concern is pretty remote. The military has that problem well in check.
A blood supply is only as safe as the reliability of the product's testing process before being certified as acceptable for medical use regardless of the donor source.
From a personal viewpoint, openly gay persons are unacceptable in the military.