Not too long ago I wrote a post about how war (a real war, not a "police action" like Iraq and Afghanistan) is imminent. The reasons keep growing as to why I believe this is going to happen by August at the latest. See this article, this article, this article, and this article. Note that three of these article are from DebkaFiles. I visit the Debka site about every day to see what is going on in the middle east. I recommend that all preppers add this site to their regular reading. Northeast Intelligence Network is another good site to follow regarding threats to the U.S.
If war does break out in the middle east, expect oil prices to go through the roof. Remember what happened to oil prices and supply in 1973 Israel was at war and we suffered through an oil embargo from the middle east because we supported Israel. While circumstances in 2010 are not likely to be the same, the effect on price and supply could be quite similar. Now would be the time to make sure that all available gasoline, diesel, kerosene, and propane containers/tanks are full. Of course, all of us should have some supply of fuel already treated and stashed away, right?
I think that the effect of a middle east war on oil prices will be the least of our worries. Look for higher prices on food and other necessities, if not outright shortages and government enforced rationing. Civil unrest, martial law, suspended elections, suspension of the Constitution, the whole shebang. My own source confirms that the federal government has plans for all of these in the works and has been conducting joint planning and exercises with state and county level law enforcement.
I believe that now is the time to put the preps in high gear. Food and fuel are both relatively cheap right now. Take advantage of it.