Pyra Labs, co-founded by Ev Williams in 1999, was supposed to make (boring) project management software. But they built a publishing tool for internal use that they called Blogger, which quickly became an outward-facing service, which quickly brought blogging mainstream and got Pyra Labs acquired by Google in 2003.
Flash-forward a few years: Williams leaves Google and helps found Obvious Corp., a sort of incubator with several projects in progress; one of them, launched in 2006, was originally called twttr, and was conceived of as an SMS-based publishing network. Nearly a decade later, Twitter has come to define Web publishing for the '10s as much as blogging did for the '00s. Will Williams's next startup focus on even shorter posts?