HipSense provides discrete directional and push notifications without distracting your eyes.
Future considerations include
* using another low-powered device like Intel Edison
* powering notifications with Azure Mobile Notification Services
* Emergency/conference calling with AT&T WebRTC
* discretely seeking out HipSense users with similar interests (like being hardware hackers!)
* Learning morse code ( http://www.hackster.io/dianaphamhere/tekkikat-teaches-morse-code ) and sending your buddies secret messages