This is an OpenSCAD Model of minds SpiderBot. The servo positions are design parameters. So you can change them and watch the SpiderBot moving. There is also some infrastructure to animate the spiderbot using OpenSCADs animate view mode.
The most recent version of this model can be checked out from the svn repository:
Extract spiderbot.zip file file and open "main.scad" in OpenSCAD. You need a recent development snapshot because this design uses the mirror() statement and the lookup() function that are new since the last release.