My mistake then, or should I say my bad memory! My most recent Amazon gift voucher was a £5 freebie from trading in games, it was it that could only be used for items supplied directly by Amazon. Doh!
Not sure about those links ashan, perhaps in readiness for some stock of the PRS-T2? Now that it's available on the Sony website (shows as in stock and available now), it should start appearing elsewhere fairly soon.