Market Research

• ACNielsen - Market research.
• CyberAtlas - "Statistics and Web marketing information"
  
• Frost & Sullivan
• Gartner.com
• GreenBook - Volume I - Worldwide Directory of Marketing Research Companies and Services
  and Volume II - Worldwide Directory of Focus Group Companies and Services
• International Data Corporation - IT data, industry analysis
• International Market Research Mall - IMR Comprehensive and expensive!
• Jupiter Media Metrix
• MarketResearch.com - Kalorama - Comprehensive and expensive!
• The Mckinsey Quarterly - Full-text articles - [Registration required]
• Mediamark Research - MRI - Research on advertising media - [Registration required]
• Nua Internet Surveys
• Quirk's Marketing Research Review - Directory of market research providers.
• The Right Site - "FREE easy-to-use Demographic Reports".
• The Sales & Marketing Source
• Simmons Choices II Tutorial - U.S. consumer buying based on media habits.