Qwitter is a simple service that will alert you (via e-mail) whenever anyone “unfollows” you. (tip)
Twitter is a phenomena. Visitors have increased 440% since last October. Currently 2.5 million people visit Twitter.com each month, but most people don’t get their Tweets via the web. They use a third party application (Twhirl, Tweetdeck, etc) or their phone.
Check out my Twitter Resources!