Someone also pointed out to me that you can use DroidScript to develop applications for Android - if you want something non-webby that also uses JavaScript.
It's got built-in serial/bluetooth-serial support too...
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Thanks!
Someone also pointed out to me that you can use DroidScript to develop applications for Android - if you want something non-webby that also uses JavaScript.
It's got built-in serial/bluetooth-serial support too...