I think the over-proliferation of Kindle model types is a risky play by Amazon. With the old Kindle generations, you had a choice between ad-supported, wifi, 3g, and DX (the awkward stepbrother no one paid attention to). Now the brand is diluted and there is no cohesive picture of what a Kindle is. Unless Amazon intends to pull a Verizon and make Kindle the “Droid” of reading, they could lose a lot of ground to the Nook. Nook is still seen as an object by most people, like an iPad. Kindle used to be, but seems to have lost its direction.