I bought my bike from a guy who had the bike for one year and said he had the extended warranty and that the warranty was transferrable. He told me he'd get me the details and never did. I sent him a couple of emails about it and he never responded.
It wasn't a big selling point for me, and I assumed that he was able to cash it in or something and that's why he didn't ever respond to my emails. I haven't needed it, but I suppose I will look it up if I ever do need it.