Hotwire.com
css, simple layout, easy to navigate, easy to find deals on major types of travel and lodging; air, hotels, cars, cruises. a tabbed main nav remains consistent throughout the site, but isn't the only route to the main pages. the home page has an easy-t0-use application for starting your search.
like that the site "remembers" your initial trip information and self-populates the data on subsequent pages. lots of good information... looks like they thought of everything!
dislike that the tabbed menu requires you to select the actual text to activate the link... it should activate when you click anywhere on the tab.
