I've never built my own shop, but I still enjoy reading these sort of threads, for the ideas that they give me to work into my own existing basement shop.
Hank, personally, I'd advise you to ignore the people who say "twice as big!" and the like. First, I suspect that most everyone who builds a shop is already stretching themselves financially to do so. Doubling the square footage isn't usually a realistic option. Second, the more I hang out in woodworking forums, the more I realize that shops are just like money. (No matter how much you have, when asked "How much do you need?" The answer is the same: "Just a bit more")
What I would like to see more of, are suggestions that save money, or don't cost much, or ways that I can even *reduce* the space required.
For instance, on another web forum I read a really good suggestion regarding lighting: This fellow built a shop, and realized that he would probably rearrange his shop in the future, so was trying to figure out what to do with his lighting. What he did was run two circuits of switched outlets down the center of his ceiling, and wired a cord to each of his fluorescent fixutures which he plugged into a nearby ceiling outlet. Now he can move his lighting around very easily, and the cost difference was minimal.