Casually perusing websites for a distant Paris vacation (Sept 2011), I noticed that there is quite a difference in pricing that did not seem to exist before. Looking at Expedi /hotwire/ orbitz/ pricline etc there is as much as a $500 difference. Seems as though in the past all the common websites were within $100 or so of one another. Good news is that there is a fare for $744 rt from Nashville inclusive. Have not seen a fare that good in a while.