Don't want to be dark cloud, but raindrop power ?!? Need to charge your laptop ... or keep your fridge cold ... or recharge your electric car? Better commence a rain dance. I note this approach to point out that in our search for dramatic new ways to get away from coal and oil, there will be some "out of the box" projects that aren't going to make much sense. And we shouldn't spend any time on them once they've been demonstrated to produce too little energy to make an impact. Maybe I'm wrong, but I group rain power with dance floor and pedestrian foot step power in a long list of quirky ideas that could distract from otherwise constructive work in more potentially promising new energy fields.
Sorry, hope I didn't rain on anyone's parade.
