I recently received a Kindle as a gift. A very nice gift, I might add. I was thrilled - I had been drooling over the ads and articles and hype surrounding the Kindle for weeks, and when the newer, lower cost Kindle was announced I knew I wanted one.
Now, I don't consider myself a technophile in the traditional sense - that is, I don't rush out and buy every little tech gadget that comes along. It doesn't matter to me that others are surfing their newer models of Mac laptops much more quickly than I am, with my 6-year old Powerbook G4. I ignore them.
But the Kindle, I knew i wanted it. Because I have been using an iPhone to read eBooks on, I was forced to compare the two devices. Sooooo...here are a few things I discovered about myself and how I have adopted to my existing (mobile) device as I started setting up and using the Kindle.

While the e-Ink technology is truly a wonder, Kindle navigation through menus and buttons does feel a bit retro
1) The first thing I noticed was that, because I use and read books on an iPhone currently, I kept wanting to touch the screen to use the Kindle. I couldn't help it - it just kept happening. Naturally, since the Kindle doesn't have a touchscreen, this didn't get me very far very fast. As a result, the Kindle feels a little retro. SCORE: 1 for the iPhone, 0 for Kindle here.
2) I immediately was charmed by the e Ink technology that makes it read like regular type on a page. This is definitely easier on the eyes than any kind of highlit screen, no matter what the resolution. SCORE: 1 for the Kindle, 0 or the iPhone.
3) I find the size to be just right for a home experience - not too large, not too small. Having a larger screen definitely feels more like a book than reading a book on the iPhone. And it is relatively thin and lightweight (although this difference is given up if you use a cover). I have not traveled with it yet, though, so we'll have to see if I feel the same way lugging it around on the train. SCORE: 1 for the Kindle, 0 for the iPhone
4) Page turning feels a little disruptive on the Kindle compared to the iPhone. You have to physically press a large key, and there is a flash of light as the page refreshes. It interrupts my book-reading experience more. SCORE: 1 for the iPhone, 0 for the Kindle.
5) Bookmarking is definitely harder on the Kindle than on the iPhone. You have to call up a menu with a specialized button, then navigate to bookmark with arrow keys, then banish the menu with the menu key. A lot of work compared to simply brushing the upper right corner of the screen on the iPhone.
However, I also need to point out that deliberate bookmarking is also virtually unnecessary on the Kindle, as the device does keeps trac of thelast page I was on in my eBook. SCORE: Tie
All in all, I am intrigued by the Kindle. I imagine I will be reading many, many eBooks on it before long. I was just a little astonished at how ingrained my mobile usage habits had become when I started to use it, and how well my little iPhone stood up to the contest of eReading.
FINAL SCORE: It's a tie. I like my iPhone - I identify with it and it is my mobile me. However, the Kindle will find a place in my life as an eReader.