Following is a group of writers who I have been following in Twitter. They are all professional, in that they all would like to get paid for what they are doing. The phrase "professional writer" is undergoing some growing pains at the moment, much like the phrase "professional journalism," but simply put, most people want to get paid for what they do at some point, and we need the professionals in these estates, as much as we need the amateurs.
@bruces - Bruce Sterling wrote one of my favourite science fiction novels, Schismatrix; as well, Sterling's early cyberpunk anthology Mirrorshades set the stage for an entire genre. Sterling doesn't post as often as I'd like, but when he does, I always pay attention. A writer with his eye on the future.
@GreatDismal - William Gibson and Bruce Sterling collaborated on the steampunk prototype The Difference Engine, and it was William Gibson who has consistently hammered in the nail of cyberpunk. He is interviewed in a fantastic film No Maps for These Territories.
@1889ca - MCM is creator of Rollbots, animated mayhem currently showing on YTV in Canada, and soon elsewhere around the world. MCM is actively searching for different ways to perform and commoditize the process and distribution of writing. Also insane.
@scalzi - John Scalzi has written numerous fiction and non-fiction books, notably The Last Colony. He lives in Ohio, so when he tweets about finishing his writing quota for the day at 2.00 on the west coast, I have to realize it is dinner time in the east. Also a creative consultant for Stargate: Universe, which should get interesting.
@agnieszkasshoes - Dan Holloway is writing a novel on Facebook called The Man Who Painted Agnieszka's Shoes. He also blogs and is a member of the Year Zero Writers collective. When Dan tweets from the U.K., it is either really late on the west coast, or really early in the U.K.
I realize these are all male writers, and I will try to rectify that with a future list. Elizabeth Hand, possibly my favourite living writer, blogs at LiveJournal as the +1 in the Inferior 4+1, but refuses to tweet.
Please leave comments on female writers who tweet!