The Family Research Council is holding a Value Voters conference in September.
A number of Presidential candidates are confirmed as speakers, including George Allen, Mitt Romney, Newt Gingrich, Sam Brownback, and Mike Huckabee. President Bush and John McCain have been invited but not yet confirmed.
Interestingly, Rudy Giuliani has not been invited. This sort of thing will continue to occur, and that is why we continue to believe — and agree with the Romney campaign — that he will not be a candidate, in the end. (more on that here and here)