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Definitely. Houdini is nodes everywhere. Nodes within nodes within nodes :-)

Could maybe add Softimage ICE to that list.

Also check out Grasshopper3D for procedural modelling.

Blender has a regular flowgraph for it's compositor and shading networks (and soon for particles, I think). Plus there's the logic bricks thing for it's game engine.

I'm glad some have taken the 3D tack. The neattools network was pretty imposing because it was so compact. Perhaps it would behoove the designers to pair a visual language with an oculus rift and 3D mouse to take advantage of the flexibility their medium offers over text.

Ha, I had the exact same idea on its disqus comment thread.