Tweet Funnel
TweetFunnel lets you establish Publishers, who have permission to create and publish tweets, and Contributors who are able to create tweets and submit them for review by Publishers. It’s editorial control made easy.
You can also monitor for tweets mentioning your username, create stockpile of tweets for future use, schedule tweets and assign tweets to another user for follow up.
If you post URLs in your tweets, Tweet Funnel will automatically shorten them.
Some recently added features includes:

Traffic rankings are sourced from multiple sources, if available, for the Twitter application. This includes Alexa, and Compete rankings.
July 4th, 2009 at 7:47 PM
Twitter Apps: Tweet Funnel http://tinyurl.com/km8d6p