It would be cool if we can get this elasto plastic in roll of filament. Does anyone know if this is available?

http://www.shapeways.com/blog/archives/1375-Introducing-3D-Printed-Black-Elasto-Plastic-I-Cant-Believe-Its-Not-Rubber.html

The extrusion process we use depends on the filament being rigid right until it is flowable.

I don't believe this would work unless there was a material which became 'rubbery' only after being heated to a high temperature above it's normal melting point (otherwise how would it become filament in the first place?)

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www.Fablicator.com

Orbi-tech sells filament made of Thermoplastic Elastomer which looks like more or less the same stuff. I have done some trial prints with it, and it does work and produce rubbery objects. It can be driven through an extruder just like any other filament, even though it's elastic. Just not as fast.

What little I've seen of the Orbi-tech leads me to believe it is nowhere near as rubbery as the shapeways product.

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www.Fablicator.com

Well, you could probably use it to print a fine jack pad for lifting a car. It's quite a bit firmer and stronger than your average rubber band. But it does stretch to at least twice the length just fine and in thinner sections behaves like the shapeways animation shows (although I have never actually handled the material from shapeways)