I first heard about them when I asked about cables from my dealer when buying my speakers and preamp. He loaned me a pair to try out and threw in some of their ICs too. I compared them over the weekend against some Kimber 12TC (which i had pretty much pre-made up my mind to buy before I heard the Crimsons) and a few other cables and ended up with the Crimsons. Their ICs made the biggest impact on me. They sound great but yes, the jackets get scuffed up easily. I believe they are closely related to Cat6 cable.
Their US distributor, Creston Funk at Austin HiFi, is also a stand-up guy. I went over to his home in LA to have him re-terminate some Crimson jumpers from spade to banana and he made me a stellar cup of coffee, played a bunch of records for me on his all Crimson/Tocaro system, re-terminated my jumpers and charged me only $20.