I bought this from dx.com. Not a review but simply testing it from out of the packet.

Info:
- Color: Black + Blue
- Material: aluminum magnesium alloy + plastic
- Length: 170mm
- Width: 60mm (max) / 45mm (middle)
- Wheel diameter: 60mm
- Wheel pitch: 90mm (between left & right wheel) / 70mm (between front & back wheel)
- Load bearing: 30kg
- Wheel rotation angle: 90 degrees
- Universal 1/4" adapter
- Designed to help you create more dynamic tabletop shots, making cool video with your DSLR

$40!!

I used it on a Canon 5D MKII. The camera is a bit big for the skater. BUT you can see the results from first try. Its pretty cool I think ;-)

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