The SkyKap Advisor is a GPS-enabled golf cap controlled by voice commands. First you plug it into your PC's USB port and download course maps from SkyKap website. Then you wear the cap out on the links, asking it for information about distance to things such as the pin, water hazards and fairway boundaries, and it whispers the info into your ear.
SkyKap Advisor was just introduced, so there's no information on pricing or availability yet. But if this actually works as advertised, it adds a new layer of simplicity to GPS technology on the golf course. It's like wearing your own satellite-enabled caddy on your head.