Amazon’s digital books library isn’t accessible on the company’s dedicated Kindle reader alone–Amazon has made an app to read digital books purchases available on the iPhone and on the PC, and now BlackBerry users will get a chance to catch up on some reading on their downtime. Books, notes, and bookmarks will sync across your Kindle, iPhone, BlackBerry, and PC with Amazon’s Whispersync technology.

To download the application for use on your BlackBerry–which should work on both touchscreen and non-touchscreen devices–go to amazon.com/kindlebb on your BlackBerry smartphone for an OTA download.

The app itself is free and you can purchase Kindle versions of electronic books through Amazon.com.

Thus far, Amazon hasn’t introduced any plans for Windows Mobile support, but with the onset of Windows Phone 7 Series, we’re hoping a compatible app will be created in due time. In the interim, Amazon also owns MobiPocket, which has a compatible bookstore and app, and you can always check out the e-reader app that is supposed to ship with the T-Mobile HTC HD2.

(via: Amazon)