Two articles that I came across, one old and one new, point to a new trend of "caching in on the internet".
The first article is one year old, and it came to my attention via an acquaintance (an MBA!) who wanted to copycat this idea. He read about it in Forbes, went ahead and bought some 50+ domain names and wants me to do "internet real estate development" with him. The second article is from the New York Times today.
Obviously, I refused to do that work due to my aversion to content free sites that have only ads on them.