Conservation Innovation - Happy Tap
The Happy Tap sounds really great. It's good to be remained not to take too long showers. The other one, that kicks you when the time is up, sounds a bit radical... :)
I work with Together.com and right now they have a competition on the website were you can confess the worst green sin you've ever committed (showered for tooooo long??) and win stuff that will make green living easier.