Now that I've had my Kindle for a few months I recently noticed a pretty dramatic impact it's had on me. In my pre-Kindle days I'd spend my reading sessions going through a few magazines as well as a chapter or two of whatever book I happened to be immersed in that week. The key point is that the majority of my time was spent reading books.
Nowadays I spend just as much time reading as before, but it's all centered around my New York Times subscription, my Kindlefeeder RSS feeds and either Time magazine or my most recent addition, MIT's Technology Review magazine. I purchased and started reading three other books on my Kindle but I haven't touched any of them in at least two weeks.
So for some strange reason, I'm finding the Kindle experience to be more useful when it's focused on shorter length, more time-sensitive content. Jeff Bezos has spoken before about our current culture's tendency towards "information snacking", or spending more time with shoter length works. Amazon's e-reader is supposed to help us embrace longer works (like books) again, but if my experience is any indication, the Kindle (and its wireless functionality) is turning out to be yet another device that enables even more info snacking.