You probably came accross the work of Chris Messina with certainty, Chris previously worked at Google in developer relations and as a UX designer at Google+. He is also known as the Godfather of the #hashtag and currently is based in San Francisco, USA. He is not the actor.
Links
- More info about Chris Messina: http://chrismessina.me
- Follow Chris on Twitter: https://twitter.com/chrismessina