iPhone developer KainosAgora has shown a preview of TweetAgora, a unique new Twitter client for the iPhone aimed at improving the signal-to-noise ratio in users’ Twitter streams. TweetAgora provides users with the ability to filter or “mute” tweets in their timeline based on hashtags, sender or conversation, allowing them to hide tweets they may not be interested in without having to unfollow people. Users can also filter their timeline to show only tweets containing photos, links or retweets and create superset lists, or “Agoras,” that contain an aggregated timeline of tweets from other Twitter Lists, people and/or hashtags. The app also provides the ability to display full conversation threads from a selected tweet, including all of the reply branches of a conversation. TweetAgora is currently in closed beta; users can apply to join the beta at [email protected] TweetAgora is scheduled for release to the App Store in mid-April. Pricing has not yet been announced.