If I'm not mistaken, Yahoo! is making some big moves in the travel sector.  I saw two new properties recently:

Richard MacManus points to the Yahoo Trip Planner, which is part travel service and part travel sharing.  As members add their trips, including lodging, sights, etc. it's added to a map and (optionally) viewable by the public. You can copy a trip as a way to start your own, etc.

At first, I thought, oh boy another itinerary planning service. Then I started looking at the public trips and realized, quite selfishly, that these trips could be really handy in helping us find ideas for specific locations. 

Imagine we're about to go to France.  This trip could serve as a starting point for things we might want to do in Paris. 

Also, Yahoo! just rolled out Richard Bang's Adventures, which is a site devoted to chronicling Richard's adventure travels.  Richard has been described to me as "the man" of adventure travel.  I believe it.