Co-founded Twitter with Evan Williams, JAck Dorsey and Noah Glass.

Twtter launched In March 2006.  Despite criticism in it's early days, many celebrities and CEOS began tweeting and the site's popularity grew to the extent that it became a powerful communication tool for US Presidential candidates Barack Obama and John McCain in 2008.

Named Nerd of the Year by GQ Magazine in 2009

Named as one of the most influential people in the world by Time Magazine.

A pioneer of blogging and podcasting.

Once worked for Google.