This is pretty cool. Great for the DIY filmmaker. Cost effective too.
RigWheels – Camera Wheels for Creativity
“RigWheels are a simple and sleek and portable way to add motion to your images utilizing support equipment that you may already own. Because RigWheels can be used in so many different ways, they are the easiest and most portable way for you to add smooth camera movement to your arsenal of production tricks. RigWheels can mount directly to your camera rig and can easily be configured as a pipe-dolly, skate-dolly, slider, etc…
What make RigWheels unique are their 4 high quality bearing wheels per carriage. The bearings are strong and sturdy allowing them to carry a load of 50 lbs per carriage. 4 wheels per carriage give you a very smooth roll and because the carriage is already constructed all you have left to do is mount them with one bolt. It's the smallest, easiest and most versatile wheel available for a great price.
In this new era of HDSLR video production, size and portability are critical factors in deciding what equipment to use. RigWheels can easily live in your backpack giving you the option of smooth motion wherever you travel.
RigWheels along with a nearby piece of pipe, glass, plexiglas, laminate, track or other smooth surface can give you the same seamless smooth motion as other options that cost hundreds more.”
Go to the RigWheels website to find out more.