This Insert Coin contender could well cure what we call "Engadget back": the slightly unappealing hunch that some editors (read: this editor) descend into after typing away at one too many articles or trade shows. The Upright sticks (through a hypoallergenic adhesive strip) to the small of your back, where it uses multiple sensors -- an accelerometer and a strain gauge -- to monitor the line of your spine -- and tell you through gentle vibrations when you're doing it wrong. We just tested it briefly here at Expand, and the reminder vibrations are far more gentle than, say, your smartphone. It kinda feels like soda water on your skin: enough to remind you that you're slouching but not enough to grate. The team behind it reckons that 15 minutes a day will be enough to reeducate your back muscles and a Bluetooth connection links the device to your smartphone to keep everything recorded for future posterity.