I definitely like the idea of the It Gets Better Project and there is a need for it. Hopefully the world is a little kinder and safer for bullied teens when they hear encouragement from people who have been through it.
That said I wonder if there isn't an opportunity being lost here. As far as I know, none of the people who have spoken out have been on the other side of the equation. There would be value in hearing from someone who used to be a homophobic bully, but who got past it. Not just as a mea culpa, although there is that. Kids are killing themselves because they think their lives aren't going to change. But one way and another they will. And there is every possibility that their oppressors will too.
Then again, it's best to make clear that this will take time.