Examples include movies, books, music, pharmaceuticals, and computer software.

FORBES: The Essential Input That Makes Singapore A Glittering Symbol Of Wealth

Mountain View's Locke suggests that the server location be taken out of the equation by basing the point of sale on where the company's headquarters are located, and Hennepin County's Johnson pointed out that software and computer-generated music transactions may prove to be undetectable and therefore untaxable.

CNN: The Internet tax revolt

Such solutions deal with only a few of "thousands of related issues, " Upson said, including how to handle product sales to American consumers that take place on American company-owned servers based in foreign countries and how to tax the sale of digital goods and intellectual property such as software and computer-generated music.

CNN: The Internet tax revolt

The computer comes packaged, in part, with Apple's iTunes music software and iMovie video editing software.

FORBES: Ten O'Clock Tech: Apple Offers Lower-Priced G4

That potentially shifts the convenience trade-off for MySpace customers in Amazon's favor, because they would be able to buy a song and get it into their computer's music manager, even iTunes, with one click using Amazon's software.

FORBES: Breaking Apple's Digital Music Turf

Products associated with copyright, and this goes beyond music to include television, movies, newspapers, magazines, books, and computer software, are one of the few sectors expanding internationally.

FORBES: We Need Strong Copyright Laws Now More Than Ever