Here's a ranked listing of Fonts.com Web Fonts' top 100 most used Web fonts for November 2012:

Neue Helvetica

Helvetica

Trade Gothic

Univers

Gill Sans

Neue Frutiger

Avenir

Avenir Next

Futura

DIN Next

Frutiger

ITC Avant Garde Gothic

Linotype Univers

News Gothic

Monotype News Gothic

PMN Caecilia

Trade Gothic Next

Neo Sans

Agilita

Arial

New Century Schoolbook

Linotype Didot

ITC Lubalin Graph

DIN 1451

Neue Haas Grotesk

ITC Franklin Gothic

ITC Garamond

Century Gothic

Univers Next

Frutiger Next

Optima

VAG Rounded

Abadi

Adelle

Twentieth Century

ITC Conduit

Rockwell

Soho

ITC Officina Sans

Garamond 3

Laurentian

Trade Gothic Next Soft Rounded

Neue Helvetica Arabic

ITC Fenice

News Gothic No.2

Eurostile LT

Soho Gothic

Frutiger Serif

ITC Century

Biome

Bauer Bodoni

Sassoon Sans

Candara

Sackers Gothic

Neue Helvetica eText

Harmonia Sans

Calibri

Futura T

Yakout

Times

Glypha

Novecento

MSung

ITC American Typewriter

Albany

ITC Franklin

Helvetica World

Sabon

Clarendon

Slate

Compatil Text

Gazette

Rotis II Sans

Georgia

Akko

Gill Sans Infant

Eurostile Next

Iridium

Georgia Pro

MHei

Monotype Garamond

Heisei Kaku Gothic

Neuzeit Office

Memphis

Bembo

Baskerville

Cachet

Azbuka

Serifa

Museo Slab

Museo Sans

Bodoni LT

ITC Officina Serif

Plantin

Aeris

Monotype Grotesque

CHei2

Basic Commercial

Janson Text

Andy

Ryan Arruda is the Web Content Strategist at Monotype Imaging. Ryan holds a bachelor's degree in film studies from Clark University, and an MFA in graphic design from RISD.