I just backed this Indie GoGo campaign and thought I would share it here. This key change is a USB drive, a small battery, charge and data cable, and a key/phone finder. Pretty cool idea that is already backed 5 times over so you know it'll get produced and released later this year.
http://igg.me/at/gokey/x/7274990
http://igg.me/at/gokey/x/7274990