- America Online (AOL) - American Customer Satisfaction Index (ACSI) - Compete, Inc. - comScore Networks Inc. - Destination Analysts, Inc. - DoubleClick e - Marketer - ForeSee Results - Forrester Research - Hitwise - J.D. Power and Associates - JupiterResearch - Opinion Research Corporation - OTX PhoCusWright Inc. - Prospectiv - Yankelovich - Yesawich, Pepperdine, Brown Sources: Russell (YPBSources:R)