Why are some of you acting as if the second the policy changes, every gay currently serving is going to rip off their uniform top, displaying a "gay pride" shirt underneath and dance in the streets to the Village People?
For nearly all of them, nothing will change save for the fact that they can rest a little easier at night knowing that some biggoted asshole isn't going to find out, take exception to them and see to the end of their service.
It's important to note, as I have in previous replies, that gays have been serving quietly probably since the beginning of our military. Only bigots and politicians are going to make issue of it. Everyone else is going to continue conducting business as usual.