Vimeo member ek2008 really took his time making this DIY video camera stabilizer. Not only looks good, but works great as seen in the video above. Look through some of the older videos and you'll see it's been a work in progress for several months.

Vimeo member Tim Nitsch uses a simple servo, spool, and a bit of string to motorize an IGUS slider. More information on how it's all put together at the video link.