I follow William Gibson on Twitter (@GreatDismal). He's as futuristic sci-fi/low-key cool as one might expect. (And I get my fangirl on now and then when we exchange tweets.)

I am a huge @gretchenrubin fan. Her posts are so thoughtful and applicable to every day life. I am actually going to read her book as the next book club book that I read on my website. As for other authors, I follow @briansolis and @dbreakenridge who wrote Putting the Public Back in Public Relations and @DanielleLaPorte (I think she's a friend of yours) who wrote Style Statement. Style Statement is going to be the third book that we read in my book club.
I have found two of the four of these authors as a result of following you, so I have to say a big, hug THANK YOU to you, @gwenbell for your fabulous posts and inspiring tweets. I can't wait to read the book that I am sure YOU are destined to publish!

I follow several authors who tweet and blog.
both twitter and blog
@wilw
wil wheaton in exile

@scalzi
whatever

@cmpriest
cherie priest

@MikeStackpole
michael stackpole

twitter alone
@neilhimself
@GreatDismal
@tobiasbuckell
@babiak writes for a local newspaper as well as several novels

@warrenellis
@scottsigler
@longshotauthor author of the dresden files urban fantasy novels

Neil Gaiman. He's fantastic. @neilhimself www.neilgaiman.com

@pattidigh always makes me chuckle on Twitter. Book is Life is a Verb. Site is http://www.37days.com/

Danielle Laporte: @DanielleLaporte & http://whitehottruth.com (How she makes truth & the reality of every creative struggle so damn sexy is beyond me.)

Pam Slim: @PamSlim & http://escapefromcubiclenation.com (Blending motivational + inspirational + instantly relatable)

Hugh MacLeod: @gapingvoid & http://gapingvoid.com/ (Who knew drawings on the back of business cards would be so intriguing? And the funny. He totally brings the funny.)

Penelope Trunk: @PenelopeTrunk & http://blog.penelopetrunk.com/ (Raw for-better-or-worse honesty & terrific inside look at living/working with Asperger's)

And hell yes to Gretchen Rubin!

Food writers:
Molly Wizenberg at Orangette
http://twitter.com/mollyorangette
Blog: http://orangette.blogspot.com/
Book: A Homemade Life

Clothilde at Chocolate and Zucchini
http://twitter.com/clotildenet
Blog: http://chocolateandzucchini.com/
Books: Chocolate and Zucchini and Clotilde's Edible Adventures in Paris

Travel writer
Alain de Botton
http://twitter.com/alaindebotton
Blog: http://www.alaindebotton.com/
Books: The Architecture of Happiness - among others

Thanks, Emma, for the tip about William Gibson.

@hotdogsladies is one of my favorite Twitter people. I think you could call him a writer, but not sure if he's a published author.

I follow @BrendaDellaCasa, author of Cinderella Was A Liar. While I haven't read her book, I love her blog Walking Barefoot. I found her through a friend of mine who shared a link to her ivillage articles back in 2007. I loved her work so much that I've been reading her blog(s) ever since.

Rhett Miller, lead singer of Old97, is also a published short story author. You can find him on Twitter @rhettmiller and his short story in the anthology "Amplified:Fiction from Leading Alt-Country, Indie Rock, Blues and Folk Artists". He was also published in McSweeney's.

He's the whole reason I found Twitter!

I'm so glad you featured @kellyraeroberts! I'm a big fan and I follow her.
I'm an educator so I also recommend and follow @brenebrown.
Also a big fan of 10,10,10 and I follow@suzywelch.

I must restate Susan Piver (twitter.com/spiver )

as well as

Rebecca Wood (twitter.com/rebeccawood108)

and

Darren Littlejohn (twitter.com/12StepBuddhist)

I'm in the middle of reading The Happiness Project, and enjoying it, but I'd actually been following @gretchenrubin for eons before I realized she was a writer. That's par for the course for me. I only realize months later that someone I'm following and enjoy conversing with is actually a published writer. I need to pay more attention!

For one, I think you saw @gretchenrubin last night in Highlands Ranch at her book signing. I wanted to go, but couldn't. What's with GR signing down there anyway? She should have been at Boulder Bookstore!!

I follow wonderful feminist writer Rebecca Walker and also brilliant fellow-Canadian sci-fi guru William Gibson, among other author/tweeters.

Seeing it on Twitter, read the ubiquitous What Matters Now cover-to-cover and followed nearly every link, from whence came a huge mind-opening and a number of (some temporary) blog or newsletter subscriptions. Still reading Gretchen Rubin (http://www.twitter/gretchenrubin), Sarah Robinson (http://www.twittersarah.com), Derek Sivers -- which I already was (@sivers), Bob Burg (@BobBurg) and check out some of their recommendations.

Forgot my buddy, @juliejordanscot's blog. Julie is a creative (writing (including poetry) acting, directing, singing, coaching, teaching, and any other art form that appeals to her) and someone in whose group coaching I participated years ago. She was the first I heard use the word "blog," tho it was a while before I bothered to find out what a blog was!