Smashing Apps has a blog posting which features slow shutter speed photography:
…we have piled up dazzling slow shutter speed photos that will take your breath away. Using slow shutter speed photography can be a totally different phenomenon if you get it right. You can use it to inspire others, or to capture light painting, or may be some smooth water effects, or it can be anything else. So here it is an amazing collection of slow shutter speed photography for your inspiration.
The first picture is of Niagara Falls…