Well, Kindle replacement update if anyone is interested. My original Kindle broke on Tuesday night, I called customer service as I mentioned above that night. Got an email yesterday saying it had been dispatched and, to my amazement, one brand new Kindle arrived by post this morning.
I was even more surprised that it was already registered with my Amazon details. I had got the original from Tesco and did that myself, but when I turned the new one on today, it was already done for me.
I think I am going to go and give the 'Last good book you read' thread a going through now, definitely need some new books! And to delete about 20 Kindle versions of The Guardian that I haven't got round to reading.