Here are some thoughts from someone who is thinking like me:

Fred Thompson would appear to still have an opening, however small, in this race. McCain is on the rise in this race but he has not sewn it up by any means.

Romney has the money, the delegates and now the poll numbers in Florida to make a race of this. If Fred Thompson leaves the race now, in its still very fluid form, not only does he embolden McCain’s challengers, he robs himself of the opportunity to be power broker or possibly a consensus candidate at a Republican National Convention.

With the exceptions of Huckabee and McCain, I want to see everyone stay in the race as long as possible, if Thompson can't get enough momentum to win it before the convention. In the hypothetical, I think that Huckabee's voters go to Thompson, and McCain's go to Giuliani, but Thompson will get his share as well. Particularly if he gets McCain's endorsement.