Very interesting - especially the lower spec 300. My guess is someone (Borders, Waterstones in the UK??) wants to compete with Amazon by giving away a reader with a large tied-in voucher for their store. Prices of hardware have to fall for the non mobileread.com public to start switching, Amazon are allegedly going to Kindlise the UK for Christmas, I sense we are on the cusp of something big.
You heard it here first!
And my 505 is as fab as the day I bought it