http://www.vdare.com/locke/palestinian_problem.htm
I don't think this idea is a good one.
"The current “road map” for peace will self-destruct like all previous ones and for the same reason: the Palestinians believe in eternal war against Israel. The world can go on proposing futile peace plans—or it can consider a solution that would actually end the conflict: the non-lethal but forcible expulsion of the Palestinians to Jordan."
The US simply can not support this position. That Isreal could have this a fall back position, I suppose is somewhat reasonable. But as a global power we simply can't support it in any way. And the UN can't support it.
Could Israel do it anyway? Yeah, but unless it really is the only way, they will pay a very high price to go this route.
And I think the roadmap can work and probably will work.