Google+ Celebrities You'll probably find better lists of celebs elsewhere..
+Mark Zuckerberg - Apparently has left now.
+Ashton Kutcher
+Alyssa Milano
+Wil Wheaton
+Paris Hilton

YouTubers (Thanks +Irena Lukin)

• +Justine Ezarik - An American viral video comedian, and Internet personality.
• +Fine Brothers Productions - Filmmakers Benny & Rafi Fine.
• +Hank Green
• +Ray William Johnson
• +Brittani Taylor
• +Philip DeFranco
• +Kassem G
• +Annoying Orange
• +Charles Trippy
• +Alli Speed

Google+ Authors (courtesy of businessinsider.com)

Food

• +Cheryl Tan - author of A Tiger in the Kitchen: A Memoir of Food and Family
• +Jeff Potter - author of Cooking for Geeks
• +Jennifer 8. Lee - author of The Fortune Cookie Chronicles
• +Alton Brown - celebrity chef of Good Eats
• +Daniel Harrington - coffee reviews and espresso news.

Fiction

• +Warren Ellis - author of Crooked Little Vein
• +John Scalzi - author of Old Man's War
• +Cherie Priest - author of Dreadnought
• +Elizabeth Bear - author of Blood and Iron: A Novel of the Promethean Age
• +Tobias S. Buckell - author of Crystal Rain
• +Mark Frauenfelder - author of The Happy Mutant Handbook
• +V.V. Ganeshananthan - author of Love Marriage: A Novel
• +Jeff Mariotte - author of CSI: The Burning Season
• +Greg van Eekhout - author of The Boy at the End of the World
• +Paolo Bacigalupi - author of The Windup Girl
• +William Meikle - author of The Creeping Kelp
• +Jeremy Shipp - author of Fungus of the Heart
• +Todd Rose - author of The 7 Habits of Highly Infective People
• +David Dunwoody - author of Dark Entitities
• +J.P. Moore - author of Toothless 
• +Christopher Hebert - author of The Boiling Season
• +David Wilbanks - author of Dead Earth
• +Jay Lake - author of Pinion

Non-Fiction

• +Danah Boyd - author of Hanging Out, Messing Around, and Geeking Out: Kids Living and Learning with New Media
• +Alexis Madrigal - author of Powering the Dream: The History and Promise of Green Technology
• +Dan Gillmor - author of We the Media: Grassroots Journalism by the People, for the People
• +Steven Levy - author of Hackers
• +Farhad Manjoo - author of True Enough: Learning to Live in Post-Fact Society
• +David Dobbs - author of Reef Madness 
• +Diana Eng - author of Fashion Geek: Clothes Accessories Tech
• +Andrew Shaffer - author of Great Philosophers Who Failed at Love
• +Gina Trapani - author of Lifehacker: The Guide to Working Smarter, Faster, and Better
• +Hanne Blank - author of Virgin: The Untouched History
• +Lisa Morton - author of The Halloween Encyclopedia

Photographers

• +Penny De Los Santos - Award winning food, travel and culture photographer
• +Zack Arias - Atlanta based editorial music photographer
• +Jeremy Cowart - Photographer and the Founder of Help-Portrait.
• +Chase Jarvis - Commercial photographer, director and artist.

Misc

• List of Googlers on +
• +Kevin Rose - Founder of Digg
• +Gina Trapani - Founding Editor of Lifehacker
• +Ingo Molnar - Red Hat kernel developer.
• +Linus Torvalds - Initiated the development of the Linux kernel.

Currently it's tough to find people who aren't talking about Google+ on Google+ - This page was designed so I wouldn't have to spend all my time routing friends to interesting profiles :)

Got any suggestions? Facebook comment streams don't seem to allow G+ urls?