Reeder for iPhone and iPad, keeps getting better -- the recent update to Reeder for iPad sees Delicious integration with YahooIDs as well as the addition of Facebook and Zootool sharing, and background syncing support for iOS 4.2.
The iPhone version of Reeder also got updated to bring feature parity with its tablet brother. Facebook and Zootool support has been added, as well as the ability to save to Delicious using a YahooID.
Additional gesture support has been added with 'slide to the left' options including 'Send to Instapaper' or 'Send to ReadItLater' meaning you can quickly clip stories for later directly from the article list of any feed. A default recipient email address option for sharing articles via email has also been added, which should speed up sharing via email if you happen to email to a mailing list, bouncing address or to a sharing account.
Download From iTunes App Store: Reeder 2.2 for iPhone - $2.99