Here's an interesting gadget -- a personal solar concentrator or heliostat. You get a computer controlled solar mirror about 3' square on a mounting pole.
Introducing the Practical Solar Heliostat System – the world’s first computer-controlled heliostat system that’s easily installable using only hand tools. Rugged design comes together with superior tracking technology & user-friendly software that runs on the User’s PC. You now have the power to direct sunlight where you want it, for whatever purpose you imagine.
Use one heliostat for natural lighting through a window or skylight – the mirrors on a single heliostat reflect as much visible light as forty 100-watt incandescent light bulbs. Or use two heliostats to reflect sunlight into a room for direct space heating*. Along with light, each heliostat reflects 600 watts of thermal energy, meaning that two heliostats provide about as much heat as an electric space heater. Several heliostats can be combined with a device like a thermal receiver for a wide variety of more sophisticated thermal applications.