Dom Sagolla is the author of 140 Characters, a style guide for the
short form. He's also the founder of DollarApp, an app studio that
produces a variety of 99 cent apps for the iPhone; and a co-founder of
iPhoneDevCamp, an international, not-for-profit developer conference
for the iPhone community. iPhoneDevCamp 3 was hosted here at Yahoo! in
July 2009, which is how YDN met Dom.

Dom describes the early days of Twitter, the epiphany that they could
change the world with 140 characters, and the birth of his new book.