Here's an inexpensive and lightweight way to add movement with your camera at different heights. YouTube member ImagineNowEntertnmnt used furniture sliders from his local Bed Bath & Beyond (as seen here) and placed it under each tripod leg [Thanks Justin]. The furniture sliders can glide along carpet, linoleum, ceramic tile, and cement, etc. With a mini tripod, I can see this being a handy tip for Wedding Videographers who need to travel light, but have access to lots of smooth surfaces to add slow camera movements.
There's a bit of shake in some examples which could possibly be corrected with a bit more weight hung on the tripod, or some post image stabilization, but in most cases it works quite well to add interesting camera movements to your footage. Pretty common stuff you can find at your local Bed Bath & Beyond, local hardware store, or even find available via Amazon (click here)
Here's a look at a prototype motorized trailer sent to me today and it's attached to a PNC Pico Dolly. Still a prototype, it's supposed be universal and have some mounting options to attach to several different dollies or maybe even sliders? The idea is to have a motorized push cart to have consistent movement all of the motors, batteries, wiring, and switches all self contained into one little unit.
There's a few 1/4x20 threads to mount other accessories on the little push car too. From the image it looks like it's around 4" wide. I have no additional information about availability or pricing at this time. What do you guys think about something like this? For more about the Pico Dolly, you can find that information at the following page: http://www.photographyandcinema.com
A quick look at the new Cinema Skater Video dolly that can support larger size cameras. On the dolly you'll see the huge Manfrotto 501HDV fluid head. There is no possible way this head would mount up on the smaller Pico Flex Dolly, so if you're looking for a dolly to support something like a Sony FS100, Panasonic AF100, or even a RED Scarlet here's an option.
Above: Sony EX1 on Cinema Skater
Thrown on the fluid head is a Canon 5D Mark II, and the Swivi LCD (for low angle shooting). This was a quick test run as we plan on throwing on the much larger and heavier Sony EX1 on it tomorrow. Build quality is A++ on this Cinema Skater, all metal, and smooth bearings/wheels. Available from eBay (click here)