Terrific Toslink Fiber Optic Cable
Crutchfield Customer Review (What's this?)
Super thin, very flexible - great audio signal. Could only be better with a braided cover for longer "cable" lengths.
Pros: High quality fiber optics Snug-fitting connectors Flexible Thin
Cons: Though I think the longer runs are covered in PVC / rated for in-wall use, I would have liked a woven-cover option. Overall that is a pretty minor nit and didn't affect my buying decision.