The spoon-scales from a while back we called "perfect for dieters and dealers" because of the spoon part, but with this wristwatch scale... Well, it's just convenient for when you really, really need to weigh small quantities of stuff right then and there. Makers Jennings call it "The first Pocket WatchScale ever" and it measures in grams, ounces, Troy ounces and pennyweights, to a max of 10.5-ounces with 0.001-ounce accuracy. Strangely the one thing it doesn't seem to do is tell the time, but it's out now, for about $25. [Product page]
I could have used this the other day. I have a $300 scale that I used to print my own postage for some eBay stuff I sold. The ghetto scale at the post office said I was short and had I had to pay extra and more annoyingly it just took a lot more time. If I could have whipped out this bad boy things could have been different.