I'm giving a presentation on worldbuilding next month at a luncheon. It's 30 minutes or so of talk, to the Idaho Writers Guild. Some in the audience will be interested in worldbuilding, some will be interested in lunch. I have my outline and am working on timing, but I thought I'd throw this out to the Assembled Wisdom. You have thirty minutes, which is maybe fifteen pages of material. What would *you* say about worldbuilding? Or, putting the shoe on the other foot (ain't it great we have only two feet and two hands?), what would you want to hear at such a luncheon? Besides what's for dessert.