Actors

Brea Grant – Plays Daphne, the super speedster, on Heroes.

David Hewlett – Actor best known for his role as Dr. Rodney McKay on Stargate Atlantis.

Janina Gavankar – Played Papi on The L Word. Also appeared in both Barbershop movies.

Kate Hewlett – Sister of David Hewlett. She also played his sister on Stargate Atlantis.

Stephen Fry – Well known British actor, comedian and narrator.

Wil Wheaton – Best known for the role of Wesley Crusher on Star Trek: the Next Generation, Mr. Wheaton has become well known for his passion for all things tech.

William Shatner – This well-known actor has only posted one update as of this writing. Seeing as he has a YouTube account that is being updated frequently, he may return.

Musicians

Britney Spears – With the launch of her new album, Ms. Spears is embracing the Internet with a redesigned website and the launch of a Twitter account. You can read more about this in Searching for the Real Britney in ‘therealbritney’ here on Mashable.