CK's done a wonderful job at compiling a visual summary(PDF) from a post a while back in which she asked the simple question:
"What is the single greatest point of value you receive from blogging?"
I'm calling this a "theme" as opposed "meme" because I believe it will spread, but ultimately it's not about CK—it's about all of us who work in marketing and actively blog. You should check it out as it includes the perspectives of all different kinds of marketers who all happen to be blogging. Some of the names you may even recognize. They are:
Noah Brier
Jackie Huba
Mack Collier
Laura Ries
Paul McEnany
David Berkowitz
Eric Kintz
Lewis Green
Vaspers the Grate
David Armano
Paul Gillin
Neil Vineberg
Monica Powers
Ann Handley
David Reich
Adam Rakunas
Karl Long
Max Kalehoff
Bob Glaza
Gavin Heaton
Tim Jackson
CK
Jordan Behan
Tricia Mangan
Mario Sundar
Ryan Anderson
Ben McConnell
Greg Verdino