Senh: It is becoming a cheaper, black & white version of the iPad - or since it came first, the iPad is a colored, more powerful version of the Kindle. It's an interesting development, although I think it's hard to break away from what you're known for. Still, it's a great alternative since it's cheaper, lighter, and has significantly longer battery life.
Senh: Smart move by Amazon. Eventually, it'll turn into an efficient black and white version of an iPad, which isn't bad. If you're just text messaging or reading email, you don't really need color.