I wouldn't recomend doing this idea at all unless you are will to devote time, money, sleepless nights, and of course any other resource you might have. Just the billing of people alone for something like this would scare me.
Best of luck, I'm sure someone might have more helpful advise then me.
The only Adsl reseller I know of is Cognigen, but they are US based I think. They basically just give you a website to sell theirs ervices, so I guess its not really reselling, more of an affiliate system.
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