If you are looking to find out more details about the US software/technology market trends, you should consider some of the following resources:

• The Gartner Group (www.gartner.com) - especially if you are selling into the enterprise software/technology sectors, Gartner provides very significant (albeit costly) research. If you intend to compete in the enterprise market you should consider working with Gartner to get positioned in their "Magic Quadrant". Find out more about the Magic Quadrant.
• Forrester Research (www.forrester.com) - Great industry summaries and vertical segment reviews.
• Data Monitor (www.marketresearch.com) - Great company for low-priced reports. One recent report - Software trends in the US is a good one.
• The US Census Bureau (www.census.gov) - great source of general statistics across many different factors in the us. View the US Census Bureau Statistical Abstract of the US. Additionally, you might want to consider the Economic Census available on the Bureau.
• The US Business Census (www.census.gov/econ/census/) - has the latest business information (2007 census, 5 yr business measures, etc).
• ABI Research (www.abiresearch.com) - is a good source for a broad set of research, especially in the wireless arenas.