At my office they've installed new urinals in all the mens' restrooms. They're water-free, using some weird pipe and chemical system to keep things clean and odor-free. The way they work is actually quite cool, and they've supposed to save tens of thousands of gallons of water per year.
Here's the downside: you can't flush them.
Growing up, there was always an emphasis on flushing. Flushing was sanitary, polite, and necessary. The sound of a flushing toilet was the sound of a job well done. We've done away with that satisfying sound in the name of water conservation, and at the same time we've removed the ingrained, Pavlovian response of completion. Now I--and every other guy at work--leaves the restroom feeling like we've forgotten to do something. You never realize just how accustomed you become to something until it's gone.
So one guy at work suggested we install a small device above the new urinal that provides the sound of a flushing toilet. I suggested that we be able to download varying sounds. "Flushtones, if you will," I added. I know another guy at work who would jump at the chance to add that one to his cell phone.