This is the first time I've seen the website, so it may be a new site that has recently launched. I'm looking into it right now. In the meantime, the phone number is the same as the Extended Warranty company we've partnered with in the past (Service Net).
There is not a 6 month extended warranty for registering - the most given is 3 months - which is still a valuable time period.
I'm not sure when the extended service plan must be purchased - there may be a one year deadline. That question simply must be answered by Service Net. That said, it is possible that the extended warranty contract must be purchased before the first year is up, even if you have three months extention.
Again, I have no authority on how that program works, and those questions must be answered by the facilitator of the program. I encourage you to report your findings, but I cannot offer that.
Their number is 866-309-9907.
Hope that helps.
I registered my LN37A550 online when I bought it at the end of last year. I was under the impression that doing so got me a 6 month extension. (At least that is what a Samsung rep on here said.) Now I am receiving an offer from Samsung to pay for an extended warranty and that my current warranty runs out at the end of 1 year. What's the real story? They say I can mail this in, call or go to www.samsung.yourserviceplan.com. Is this for real?