Some additional things to look at; here in Canada there are actually 2 LR Plans - the typical LR Assured (which has recently been renamed "LR Exclusionary"), and an LR CPO - I'm not sure if that's the exact name or not, but it was how the local sales manager referred to the plan. The two plans are identical, other then in price. The LR Assured/Exclusionary for a 2006 LR3 SE lists at $5300 CAD for a total of 7 years/100k miles from the initial in service date, while the "CPO" (again I doubt that's the actual name) is $3200. The difference in the plans - who sold you the car! If you bought used from a Land Rover dealership you may be eligeable for the CPO pricing (it's possible that it might have to be purchased at the time you buy your CPO - I didn't ask as I wasn't going this route).
I'm not sure if this mirrors whats in the US, but until last week I had never heard of the plan (and I've been a LR owner for 4 years, and have frequented various online forums). Granted, there's little Canadian specific info online, but I'm suprised it hasn't come up.
For what it's worth, when I transferred my last warranty to a new owner and was speaking with the folks from LR Assured/Exclusionary, they mentioned that the warranty is a North American warranty and that I could use it in the US or use it in Canada, or vice-versa. If the difference in the Canadian or USD increases dramatically, this may be an option for some of you as well!
And for anyone looking - re-read mustbeaudi's post a page back about "Exclusionary" warranties - this is the ONLY one that you want for an LR3!