I’ve had a kindle since they first came out, I’ve loved it since day one and use it pretty much every night to read for hours on end. In the past I would leave the wireless off though. With the 1st Gen kindle you could get a lot longer battery life if you didn’t turn the wireless on. Once you were reading a book, you could read for several days without needing to connect to Amazon’s servers. Only once you had finished a book and needed to add more did you need to turn it on to sync.
A few months ago, I downloaded Amazon’s kindle app for the iPhone, more out of curiosity than anything else. Initially I just couldn’t see myself reading books on such a small screen, especially one that was backlit and would cause eye-strain. However, in the last couple weeks I’ve discovered how seamlessly Amazon has made syncing devices and reading locations. Since during the day, I pretty much always have the iPhone with me, I can just pull it out and start reading. The iPhone is perfect for the situation where you might only have a few minutes and might need to put it away very quickly. I was getting my van washed yesterday and was able to read for 5 min at the car wash. The magic happens though when you get back home, turn on your kindle and it knows to sync your reading location up to where you left off on the iPhone and vice-versa.
I’m now finding that I’m able to get even more reading done during the day. Filling in small breaks instead of waiting for a single block of reading before bed.