You've inverted the analogy. You're saying if I want to use Verizon Online/MSN I shouldn't expect to get it through Covad. And I agree. A correct analogy would be a store ONLY offering its own house brand, while being the only retail outlet in the area. If I don't like the house brand then I'm screwed.
We've seen the effects of that many times. And each time it involved a monopoly (or near-monopoly) the results were bad enough to get the government involved. For instance, in the old days you HAD to use IBM software and peripherals with your IBM mainframe. It was called "bundling", and the government eventually stepped in and forced them to unbundle their products and services.
Most of the "examples" you cited aren't valid analogies. In almost every case the "bundles" are value-added services or features that might make using one service slightly mor attractive than using a competing one. The Verizon "bundling" is much more like the sporting event, where you're FORCED to use and pay for the parking facilities associated with the event.
John Meissen snipped-for-privacy@aracnet.com