What Mack started as a simple effort to bring more link love to lower ranked bloggers has slowly built steam and is growing in blogosphere prominence. For those not in the know, here are the origins:

Here’s the deal: In an effort to bring more link-love to those blogs that I feel aren’t getting their due, I’ve created a small list of blogs below that I’ve linked to. The idea is to create a meme built around giving link-love to the blogs that deserve it, and hopefully turn Technorati’s system of using a blog’s # of links to determine its ‘authority’, on its ear – Mack’s post

Here are Mack’s further updates: here and here

Most recently, Mack’s Z-list got picked up by Seth (via the Hitchhiker’s guide!) who then created a Squidoo page for readers to vote on their favorite z-list blog! It’s a small blog world out there!

For those interested in expanding your Google reader RSS feeds with some new feeds for the new year. Here’s the expanded Z-list (all blogs recommended by your favorite marketing bloggers!):

Creative Think
Soloride
Movie Marketing Madness
Blog Till You Drop!
Get Shouty!
One Reader at a Time
Critical Fluff
The New PR
Own Your Brand!
OTOInsights
bizandbuzz
Work, in Plain English
Buzz Canuck
New Millenium PR
Pardon My French
Troy Worman’s Blog
The Instigator Blog
AENDirect
Diva Marketing
Marketing Hipster
The Marketing Minute
Funny Business
The Frager Factor
Mindblob
Open The Dialogue
Word Sell
Note to CMO:
That’s Great Marketing!
Shotgun Marketing Blog
BrandSizzle
bizsolutionsplus
Customers Rock!
Being Peter Kim
Pow! Right Between The Eyes! Andy Nulman’s Blog About Surprise
Billions With Zero Knowledge
Working at Home on the Internet
MapleLeaf 2.0
darrenbarefoot.com
Two Hat Marketing
The Engaging Brand
The Branding Blog
CrapHammer
Drew’s Marketing Minute
Golden Practices
Viaspire
Tell Ten Friends
Flooring the Consumer
Kinetic Ideas
Unconventional Thinking
Buzzoodle
Conversation Agent
The Copywriting Maven
Hee-Haw Marketing
Scott Burkett’s Pothole on the Infobahn
Multi-Cult Classics
Logic + Emotion
Branding & Marketing
Popcorn n Roses
On Influence & Automation
Bullshitobserver
Servant of Chaos
converstations
eSoup
Presentation Zen
Dmitry Linkov
aialone
John Wagner
Nick Rice
CKs Blog
Design Sojourn
Frozen Puck
The Sartorialist
Small Surfaces
Africa Unchained
Perspective
gDiapers
Marketing Nirvana
Bob Sutton
¡Hola! Oi! Hi!
Shut Up and Drink the Kool-Aid!
Women, Art, Life: Weaving It All Together
Community Guy
Social Media on the fly
Jeremy Latham’s Blog
SMogger Social Media Blog
Masey.com

Speaking of Seth, here’s a recent podcast interview of him by Jennifer Jones (Podtech).