Internet statistics and demographics, e-commerce market projections, and reports are exhaustively covered in this site; it contains both free and fee-based (i.e., subscription) information.
The full text of the Federal law (Controlling the Assault of Non-Solicited Pornography and Marketing Act of 2003) related to e-mail solicitations.
This is a comprehensive source of information for small businesses, particularly on Internet-related businesses and related international trade.
The Center provides information about marketing products and services on the Internet.
The summary profiles by county and by state from the U.S. Census display frequently-requested demographic facts.