Originally Posted by Serpentine
From what I know, if you register it to an account which is not a US resident, the adverts never activate, and it works as a normal paid up Kindle. I'm not sure if you can change account later and not get ads.
No, that's incorrect. You get the ads regardless of where your account is registered. I have a Kindle Touch with Special Offers; my Amazon account is in the UK, and I get the ads (which I prefer to the normal screensavers - they're a lot more varied).