I've just uploaded a couple of VCarve files to Github that might be useful to get you started cutting your own jigs and fixtures. They are in the "Accessories" folder under "Handibot Cut".
The first is a 3-part fence that's puzzle jointed together and bolts to a Handibot through the two front holes in the base. It gives you an accurate y=0 reference, and the center section is replacable and reversible if it gets cut into by your bit. There are pockets for 1/4-20 t-nuts that you can use to mount the fence using flat-head bolts. It's cut out of 1/2" plywood with a 1/4" bit zeroed at the top of the material.
The second is a set of indexing blocks that let you accurately move a Handibot along a long fence. They connect with the same puzzle joint so that they can be assembled into rows and let you cut larger things, by tiling 5" in X and 7" in Y. A Sketchup model of the system is in the
3dWarehouse. They're also cut out of 1/2" plywood with a 1/4" bit.
The idea for these is that they could be used to make more elaborate and permanent jigs and fixture, using just a Handibot...hopefully you'll find them useful.
Bill