Larry:
I'm going to play Prez for this post.
There's no way I'm going to visit Israel/Palestine for show. There's no upside for me if all I do is show up. But I have a plan.
My plan is to lay it out for them.
For Abbas: "You figure out a border you can live with. You can have some of Israel, but you're going to have to give up on the existing, contiguous settlements. You can even have part of Jerusalem, but don't get greedy. Take your time. Have it to me by Passover."
To Olmert: "Deal with it. We're getting this done this year. You can still take the crazies as necessary."
More accurately:
"Look here guys. I'm a severly lame duck; Olmert, you are about 10 voters short of being kicked out of office; Abbas, you're lucky to get through the day without getting assassinated by your people. So, let's take this vast political capital and work out a plan which, though it will undoubtedly be unpopular with a large minority, perhaps even a majority of Israeli and Palestinian alike, will nevertheless be followed by them because of this powerful mandate granted us by our publics."