We have worked for a long list of clients (partial list):

American Express Havas Saatchi X
Arnold Havas Media Spark44
Assembly Hill Holliday Spring Design
AT&T Horizon Media TBWA/Chiat Day
BBDO JWT TracyLocke Partners
BBH Kirshenbaum (KBS+P) Taxi
Berlin Cameron Kraftworks OMD
Cline Davis Mann (CDM) LG America Publicis Kaplan Thaler
Colangelo MasterCard Rapp
Cramer-Kresselt McCann Renegade Marketing
DavidandGoliath Mercedes RP3
DDB Merkley & Partners Sony
Dentsu MRM/McCann Spring Design
Deutsch Momentum Worldwide The Gate Worldwide
Digital Pulp Ogilvy The Lathe
Dimassimo Goldstein (Digo) Ogilvy CommonHealth Time-Warner
Erwin Penland Partnership for a Drug Free America Tribal
Fallon Publisher’s Clearing House Turner Broadcasting
FCB R/GA McCann
Generator Media Roberts & Langer Verizon
Geometry Saatchi & Saatchi Visa
Gotham Saatchi Healthcare Volvo
Grey Saatchi Wellness Wunderman
Group M Siegel & Gale Y&R