Kindle owners may have had to sit by for a while as iPad owners got all the cool toys like Netflix, games and, oh, a color, backlit screen. But the latest software upgrade for the Amazon e-book reader promises a handful of niceties, including a Twitter client, password protection and better fonts. You can even — drum roll please — organize your books into folders.

The full set of new features in Kindle 2.5 includes:

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

Facebook & Twitter Posts: Share 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.

The new features will be available in late May, unless you’re an early adopter using a first-generation Kindle. In your case, you can expect this upgrade just about never.

Kindle Software Updates [Amazon.com]

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