Android: Google's Reader webapp is pretty good, but we've longed for an official, native Google Reader app since we started using Android. Today, Google made that dream come true, with extras like volume-key navigation, multiple accounts, and sharing.
The app really is a great self-contained version of Google Reader, offering full searching and subscribing capabilities right from the app. You can also use multiple accounts, sync your preferences and share articles with your friends (as well as view their shared articles).
Among the features you'd come to expect, however, are a few cooler features that we're really excited about. Top on the list is volume-key navigation, which, one enabled in the settings, will allow you to skip through your feeds quickly (à la the j and k shortcuts in the desktop webapp). You can also long-press a folder or a subscription to rename it, unsubscribe from it, or change folders. And, as with most Android apps, you can hit the menu button to send an article to other apps like Facebook, Gmail, and Twitter. If you're still unsatisfied with the Android RSS readers out there, we highly suggest giving this one a go.
Google Reader is a free download for Android phones. It's available in the Android Market, but you'll have to scroll down a bit to find it. Alternatively, hit up the QR code to the right to download it right away.