Just spotted this cool project by the other Martin Taylor in the MAKE Flickr pool:

$12 in hardware store bits & pieces, 1 old skate from the basement and a tripod head borrowed from an old tripod. My Labor-day, afternoon, quick, DIY project. It doesn’t look very pretty but it works well enough with anything from my tiny camcorder to my 5D.

If, like myself, you don’t know what a skater dolly is used for, exactly, check the embedded vid Martin made to demonstrate. Impressive results for such an inexpensive tool. Martin, who previously brought us this slick iPhone teleprompter, seems to have a real knack for doing a lot with a little.