Twitter is indeed the fastest growing micro-blogging , and proved to be the fastest source of information.

Myself to tweeter: www.twitter.com / sandraja

Do you know what is  Social Mention ?

Like Google Alerts but for social media. Receive free daily email alerts of your brand, company, CEO, marketing campaign, or on a developing news story, a competitor, or the latest on a celebrity.

More about that at http://www.socialmention.com/

1. http://herebetwitterers.com/ let’s you see all your Twitter friends on a map using Twitter and Google APIs.
2. http://wptweety.com/ Twitterwall displaying Tweets about WordPress in realtime.
3. http://www.twitlogo.com/ cool service that generates a Twitter logo on the fly.
4. http://tweet1.com/ Tweet #1 is a really cool and fast way to find the first tweet of a Twitter user.