Amazon just officially released firmware version 2.5 for Kindle 2 and Kindle DX. It will be delivered automatically via Whispernet but if you do not want to wait any longer, you can download and install the update manually.

Just go to www.amazon.com and follow the instructions.

We’re excited to announce that a new, free software update is now available for Kindle and will be automatically delivered to your device. The features included in this update are:

* Collections: Organize your books and documents into one or more collections.

* PDF Pan and Zoom: Zoom into PDFs and pan around to easily view small print and detailed tables or graphics.

* Password Protection: Password protect your Kindle when you’re not using it.

* More Font Sizes & Improved Clarity: Enjoy two new larger font sizes and sharper fonts for an even more comfortable reading experience.

* Facebook & Twitter Posts: Share meaningful book passages with friends on Facebook and Twitter directly from your Kindle.

* Popular Highlights: See what the Kindle community thinks are the most interesting passages in the books you’re reading.