Alliant Energy
Altria
Bansley and Kiener, LLP
Baxter International Inc.
BDO, Seidman LLP
Blackman Kallick
BP Oil Americas
Calamos Asset Management, Inc.
Caterpillar, Inc.
Clifton Gunderson LLP
Crowe Horwath
Deloitte.
ECS Financial Services
Eder, Casella & Company
Ernst and Young LLP
Excelon Corporation
Frank L. Sassetti and Company
Grant Thornton
Hamilton Sundstrand
Hartmarx
HSBC
Huron Consulting Group
Illinois Tool Works, Inc.
KPMG LLP.
John Deere Agricultural Marketing Center
Kraft Foods

Kutchins, Robbins, & Diamond, Ltd.
Lindgren Callihan VanOsdol and Co. Ltd.
Lombardozzi, Moses, Quimby & Co., P.C.
Meaden & Moore, LLP
Miller Cooper & Co., Ltd.
Millikin, Benning, Kleckler, & Kobischka
Motorola
Mueller & Co. LLP
Nykiel-Carlin & Co.
Pactiv Corporation
Plante & Moran, LLC
PricewaterhouseCoopers LLP
Reznick Group
RSM McGladrey
Scholle Corporation
Sears Holding Corporation
ServiceMaster
Sikich Gardner and Company
Stepan Company
Sun Chemical
Tribune Company
U.S. General Accounting Office
Walgreens
Warady & Davis LLP
Wolf and Company