On other lists I've noticed people who changed travel plans because
the fuel cost was too much, I (personally) doubt it will be any less
next year or the year after that.

I am not changing any plans now but what happens in 4 years when it's
15 dollars a gallon. Mexico  exports it's last barrel of oil in about 2014.
So when a full cost 150 dollars what then?
Are we going to be driving these babies?