Looking at a CNN Money story on Viacom (whose chairman is called Sumner Redstone, mind you), I was struck by the 4 advertiser links provided by Yahoo! Search Marketing (formerly Overture Services).
(If you follow the above link and see different ad links, simply refresh a few times.)
All the links are paid for by companies named Redstone, which have nothing to do with good ol' Sumner. I clicked on some of them, making them pay Yahoo! a fee (which will be split with CNN parent Time Warner).
So much for the numerous PhD's who built Yahoo! search and its contextual matching algorithms.