Nestled on a side street behind the old GM Building on West Grand and north of Wayne State University is a promise that Detroit may not be dead yet. It\'s called NextEnergy, whose founding tagline -- \"economic security through energy diversity\" -- amounts to a national creed in these days of nearly $3-a-gallon gasoline, global instability and mounting (not to mention real) fears that our energy-dependent world may be poorly prepared for what\'s ahead.