Well, I may not have a Kindle but I do have an iPhone.
I just downloaded the Kindle for iPhone app after reading Chris' review of it. I was kind of worried when I first went and looked it up last week and there were no reviews. I thought I would wait awhile before downloading it. Now, only a week later there are over 700 reviews and mostly positive.
I also purchased a book. (I just couldn't wait.) Plus, I need easy to take with me reads for Spring Break. What did I get? Glass Houses by Rachel Caine. $4.79! Not bad. It was in the app in a matter of seconds. It looks great too. Easy on the eyes, easy to change pages. (I read through a few.)
There are some complaints about not being able to purchase the books right from the app but it is so simple to do it off of Amazon that I didn't really see it as a problem but I am sure it will be a feature soon enough.
Have any of you tried it out yet?