Why spend a cool $1000 or more on a touchless toilet when you can make a Roboflush mechanism yourself with a bit of programming and LEGO NXT Mindstorms? The ultrasonic sensor discovers your presence, and as soon as you're done and gone, it sends the signal to the NXT unit which croaks out a strained "thank you" (some of us thought it was saying "fuck you"), and then proceeds to trigger the lever-pushing mechanism. It's not beautiful, but hey, it works. Team it up with one of those clean-butt Washlet toilet seats or maybe a hands-free toilet paper dispenser, and never touch anything disgusting again. Follow the link for the full do-it-yourself instructions. [Battlebricks]
@frndlybnny: that's why you cover it all in the finished product - they didn't have it covered here because they wanted you to appreciate the splendor of their creation, the beautiful form and function, intertwined as one. I, this project, must do.