I was also confused by this terminology. Unfortunately, I made the mistake of looking it up on urban dictionary.
I see a Kindle app has now been made available for Touchpad owners (but only for US at the moment). I had a play with the Touchpad in PC World and it seems like a fairly good device. It is good to see WebOS back on the highstreet in the UK. However, now HP has ditched the Pixi form factor I have relapsed and gone back to a Blackberry Bold. Not as pretty as WebOS but I don't miss the lag!