Twitter is a great way to keep in contact, distribute news and generally tell people what you are up to. The success of Twitter users is generally measured in the amount of people that follow your updates.
You get information on your Twitter profile as to how many people follow you and you get notified when someone follows you. However, there is no notification when someone stops following you and you generally don’t have any insight into when people follow or leave you.
This is where the TweetEffect comes in – simply enter your twitter name and they analyze your 200 latest updates and flag those up that made people follow or leave you.
Hat tip to @Guy Kawasaki