There are several very useful travel sites on the web - using a Web 2.0 approach.

This is a very successful French owned site:

LASTMINUTE.COM      www.lastminute.com 

And this is an American owned site:

TRAVELOCITY    www.travelocity.com

Or this very useful site to find new, good and un-known hotels:

HSR ( HOTEL RESERVATION SERVICE )   www.hrs.com

Very practical sites for daily use - esp. if you want to save money.

What do you think?