The planet gets invaded once again this weekend, in the unsettling form of Keanu Reeves, as a remake of "The Day the Earth Stood Still" arrives in theaters. A lot has changed since the alien Klaatu first landed on Earth in the 1951 original. The human race has abused the Earth's natural resources to the brink of ecological calamity, while the world's financial markets are on the verge of collapse. We live in a time when Paula Abdul won't go away, and Sidney Poitier can't seem to make a comeback. And the trans fat has been removed from Girl Scout...