Locally based Mann Properties and Illinois-based Opus North are putting together plans for 1.5 million square feet of industrial and office space along Interstate 69 in Madison County. The 140-acre development, in Ingalls (pop. 1,500) will be called I-69 Trade Center, the developers said. The $100-million project joins several industrial developments planned or under construction in remote areas along Indiana highways, outside the distribution powerhouse of Plainfield. What impact are these projects having? What else is new in industrial real estate?