The word I have gotten says that Amazon used the same company that produced Blackberry for a lot of the hardware to save time. Amazon used their own UI.
Also
http://techcrunch.com/2011/09/26/amazon-kindle-fire/
Kindle "Fire" 2nd week Nov - ship
custom UI
TI dual-core OMAP chip. Probably 1.2Gz
As for the name. Remember you use
kindling or twigs to start a
fire.
Did anyone see the "twigs" model, or was that an abandoned prototype?