CNN reports that the Internet has now crossed a significant milestone; there are 100 million operating websites. The Web's growth has been accelerating: "There were just 18,000 Web sites when Netcraft, based in Bath, England, began keeping track in August of 1995. It took until May of 2004 to reach the 50 million milestone; then only 30 more months to hit 100 million, late in the month of October 2006."
This is kind of like human population growth. The bottom line here is that the more unwieldy the Internet becomes, the more central search becomes as the main navigational tool. And that means -- ka-ching -- paid search will continue to grow for the foreseeable future.