Those users are now illegally trading about 250 million songs each week.

Bracelets and jewelry boxes allow users to trade virtual goods and add online friends by coming together in the real world.

There are websites where users can trade, donate, buy and sell gift cards.

The site also allows users to trade in non-liquid assets.

But the site also includes a feature called Scour Exchange, which allows users to trade music and movie files they keep on their computers.

He said his service should not be compared to Napster because it permits users to trade files through private message exchanges.

Tradepal is a peer-to-peer marketplace where users list, discover, share and trade unique items with trusted peers.

Farther in the future, SpotScout hopes to allow users to trade information about the availability of parking spaces on the street.

Or are your users trade customers who you want to establish a service contract with?

But Morpheus enables users to trade files of any kind, and an increasing number of them are filled with copyrighted video entertainment.