I just downloaded the newly available Kindle software for the BlackBerry. It's pretty cool - you can download any of the Kindle books you've purchased (or even got for free) from Amazon and it even syncs your place with your Kindle device.
You can download the software from your BlackBerry by browsing to amazon.com/kindlebb
or go to this page -Kindle for BlackBerry - and enter your BlackBerry email address to be sent a link. The software is free and no Kindle device is required. This will be especially handy for owners of the Storm and Storm 2 with their wonderful large screens, but it even looked good on my smaller screened Curve.
Disclaimer - I work for RIM and own a bit of stock in Amazon to boot. :::smile:::