"Co-host of the podcast, asking technical questions about protocols and social networks."

"Co-host of the Techmeme Ride Home podcast."

"Co-host of the podcast and technology expert."

"Guest on the episode, speaking directly with Gruber about his invention of the hashtag and Twitter's early resistance."

"Host of the podcast, actively participating in the discussion and mentioned by name at 11:07 and 12:06."