March 4, 2009 -- What do Ashton Kutcher, Sam Champion and MC Hammer have in common besides nice hair and sweet dance skills?
You can follow their every move on Twitter.
For the very latest from your favorite morning television program, follow along with "GMA's" Twitter page by clicking here.
For the uninitiated, Twitter is essentially an Internet site that lets you share your thoughts and activities with the world in near real time.
Users get 140 characters -- that's not much -- to say what they are doing.
Now "Good Morning America" is getting in on the act. At "GMA's" Twitter page you can get up-to-the-minute updates on what we're doing.
But we're far from the only ones who "tweet" away the day.
For instance, ABC Dude, ABC News' John Berman, tweeted while writing a piece about Twitter.
Sam Champion tweeted during the Oscars.
For many celebrities, Twitter gives a direct line between them and fans.
For instance, the more than 220,000 people that follow Kutcher could have read Tuesday that he took a French class and wanted crepes, but decided to work out instead.
Hammer has more than 150,000 followers and tweets about 50 times a day.
"I love anything that shortens the distance from creation to consumer," Hammer said of Twitter. "The middle men keep getting in the way."
One of Twitter's co-founders, Biz Stone, explains the online phenomenon poetically.
"It's rudimentary communication that's happening in real time between individuals and allowing them to move as one in this beautiful way," Stone said.
Twitter: Life Between E-mails
According to one expert, Harvard Business School professor Andrew McAfee, the tool taps into a previously unrealized need.
"Twitter has uncovered a need that most of us didn't even know we had -- to talk about ourselves, to broadcast our lives and our work in a very low cost, low overhead, but very public way," McAfee told "Good Morning America."
Advertisers and self-promoters latched on quickly and even Congress is getting in the mix. Many members of Congress tweeted during President Obama's speech last month.
Beyond politics, according to Hammer, people care what he's doing all the time because "in real life we want to check in on what people are doing -- the latest fashion, the best movie, the best hair style, the hot book. That's why we follow each other, for information on what's relevant."