Erykah Badu needed to get Paul McCartney’s permission to sample from one of his songs. What could have taken days or weeks traditionally was done in hours, most by using twitter.
Now, it’s not all magic, of course. Badu who contacted Lenny Kravity, who connected her with Paul’s famous daughter, Stella McCartney. Those are likely not people who are going to respond to just anyone’s tweets. But the directness and quickness and connectedness of twitter is something that everyone can experience. This is just one famous example of it. Expect more to come.