Reeder is a lightning-fast RSS reader that syncs to your Google Reader account. Since it uses Google’s servers as a backend, it takes only seconds to download your latest unread items and will keep their read/unread state synced up with any other Google Reader-connected RSS aggregators you may use…such as the upcoming Mac version.

Reeder’s interface is definitely one of the best as far as iOS feed readers go, both on the iPhone and the iPad. You can browse items either in an “all unread” view or flip between feeds individually. The leather-bound book look is nice, too.

The app integrates nicely with many other services, like Instapaper, Twitter and Delicious. You can save or share an item with a couple taps.

This is one of the better RSS apps for iOS, and from what I’ve seen the Mac version will be stellar once it becomes available.