Feng Shui and Garden Design:
New Outdoor LED Lighting and Gardens:
Outdoor lights have come a long way since the low powered 'Malibu Lights' of the past. Right now chinese factories are pumping out all kinds of outdoor LED lights, including spot lights, string lights, LED fluorescent lights etc. and their varied spectrums and energy saving properties now make outdoor lighting almost environmentally responsible (attention still has to be paid to observatory obsoleting light pollution and possible plant and algae growth considerations, but at least these don't rule out LED lights altogether, they just mean you have to pay attention to the wavelength of light coming from them -something that's easy to do with most LED's discrete wavelengths). Check out these links below to examples of LED's used in landscaping and companies offering LED outdoor lighting.
Fractal Garden Design:
Something that's not been used much in garden design but should be are fractal based designs. Check out the links below for some fractal gardening ideas, including Arthur C. Clarke's explanation of fractals and several pages showing fractal generated landscapes.