Really good article up on the "Fermentation" wine blog discussing the horror of the antiquated three-tier system that strangles many states, "The Three-Tier System and Consumer Access To Wine".
This is just another in a long list of reasons that large, commercial wineries not only thrive but dominate the market. If it was easier to get small producers into markets and everyone wasn't focussed on the economies of scale, we'd all be drinking much better wine.