Haha! I was looking for a reason to not fork out $600 for a shower head, too. Too much water waste, bottom line.
Thanks for checking out "Energy & Power". It started it out of personal interest in this issue and eventually thought I'd share the interest in the form of a cubit... so we could all learn. Your region may not be able to use the solar panels some other regions use. I'm of the belief that an individuals solution to energy efficiency/low carbon footprint is going to be a regional solution. Think of how diverse the terrain and weather are in the U.S., alone. Fossil fuel may be the universal solution but it's a finite resource... we're running low and with China and Brazil ramping up consumption... it's going to deplete quicker and at an increasing $$$ rate. Supply and demand. Still looking! Interesting stuff.