Rotating Lead Pencil
(click for link)
Check this out! A mechanical pencil that rotates constantly to get an even wear on the lead! Amazing idea, and if you, like me, use these things all the time, you will understand why that is a good thing.
So why am I not buying it?
Because as an artist, I need multiple kinds of tips to produce artwork. I use a sharp edge for line work and a soft worn down angle for shading. Over the years I've learned to manipulate the lead to get whatever kind of tip I need. I do waste lead this way, but not that much and the stuff comes cheap- plus it's a great result.
But I'm sure it's awesome for writing!