A new service Qwitter was launched today which tells you who stopped following you on Twitter and why.

Qwitter will send you an e-mail notification whenever someone stops following you on twitter.

Though I think one is better off without knowing why and when someone is un-following you but if you are curious just put in your twitter name and your email address and you’ll start getting messages when people un-follow you along including the latest tweet you’d posted before they pulled the plug. There is an unsubscribe link too if you are having second-thoughts after signing up for bad news.