Here’s my list for AOTechnorati100, OpenMedia100

The Pioneers: (formerly The Founding Fathers): industry luminaries who created the vision of open media and continue to shape it.
Xeni Jardin
Shelly Powers
Dave Winer
Jeff Jarvis
Adam Curry

The Tool Smiths: web service entrepreneurs and companies building the open media tools (blogs, social software, wikis, RSS, analytic tools, etc.).
Caterina Fake
Dave Sifry
Scott Rafer
Rich Skrenta
Roland Tanglao

The Trendsetters: the influencers driving and evangelizing the adoption and applications of Open Media.
Brewster Kahle
Marc Canter & JD Lasica
Mary Hodder
Doc Searls
Dave Weinberger

The Practitioners: the top bloggers in politics, business, technology, and media.
Jason Kottke
Rafat Ali
Om Malik
Susan Mernit
Halley Suitt

The Enablers: the venture capitalists and investors backing the Open Media Revolution.
Dave Hornick
Esther Dyson
Joi Ito
Brad Feld
Hilary Schneider

AlwaysOn, AOTechnorati100, blogosphere, OpenMedia, OpenMedia100, tags, technorati

Update: Jeneane’s points are well-taken.
Update 2: Peter has a great list and more dead-on comments–probably shoulda been the 200..or not happened at all.
Those Bastards has the best take on a more cynical viewpoint, via mobile jones .
Another good (and amusing) list from Barb D.