Couchsurfing is a new Web application that travels. It involves using the web to make contact with someone else where you are travelling and make arrangements to crash on their couch. It's built somewhat on the principles of eBay, including a rating system. Yes, there are risks. It's not for the faint of heart. But it is catching on with young people. globeandmail.com: 'Couchsurfing' travel takes off on Web