Many of our fellow classmates are too young to remember Ma Bell and the baby bells (ie Pacific Bell, etc) in reference to oligopolies. But I think that we are all familiar with Las Vegas and the extravagant casinos housed there. I have found two blogs that talk about mergers of the casino business that may put oligopolies in a new light by using examples that are more familiar.
The first titled "A Safe Bet" in the Oligopoly Watch gives a great overview of what the merger or rather formation of the oligopoly entails and the other blog titled "Gaming Industry Consolidation" goes more in depth.
Hopefully these sites can help my fellow classmates and myself understand oligopolies.