Evan Williams has a habit of building software to help people broadcast their thoughts. In 1999, he developed Blogger, the easy-to-use blogging tool that Google snatched up four years later. His latest project is another self-publishing service, a miniblog service called Twitter. Launched in March 2006, Twitter lets people broadcast short messages from computers and phones to anyone in the world. The idea has generated a fair amount of buzz, but while some people love the idea of a constant stream of updates, others are appalled. Williams doesn’t seem too worried about the critics, though. He says he saw a nearly identical response when he introduced Blogger. Technology Review caught up with Williams to discuss Twitter and its implications.