If anyone cares to learn more about what the changes in estimated risks would actually be if homosexual donation was accepted, I recommend reading the article I've cited below from the medical journal
Transfusion. The online site may require you or your library to have a subscription, so if you don't have access to it and would still like to read the article, message me with your email address, and either I'll email it to you or one of the hospital librarians will. If they email it to you, they might email you as Dr. your name... if so, just go with it.
-Brad
Transfusion; Volume 43 Issue 1 Pages 25-33 - January 2003
M. Germain, R.S. Remis, G. Delage (2003)
The risks and benefits of accepting men who have had sex with men as blood donors