The hugely popular PicStory image filtering and sharing app got a nice update to v4.0.1 recently. They announced the new features on their Facebook page when it launched in mid July but they have just put out a maintenance release to v4.0.1. This new update to v4.0 adds a whole new UI along with 20 new filters and improved image quality. Definitely worth checking out.
You can pick up PicStory free in App World. Let us know what you think of the update!