Here is my latest must see travel web sites (in no particular order):
1. Farecast - Predicting airfares is tough. This site makes it easier by giving you advice based on historic data if the price is likely to go up, down, or stay the same based on your travel dates.
2. Happy Median - Ever have multiple friends getting together and you cannot decide where to meet that would be fair to everyone, well Happy Median takes care of this by allowing you to enter multiple addresses, selecting the type of place you want to meet and providing recommendations of locations as central as possible to everyone.
3. Inside Trip - InsideTrip takes flight search to another level by letting you add comfort level as a search parameter. Is legroom important to you? Aircraft type? Lost-bag or on-time percentages? InsideTrip is the sight for you.
4. Trip It - TripIt takes the hassle out of travel itineraries. Simply forward your travel confirmation e-mails to its email address and TripIt will build you a master itinerary, complete with flight/hotel info, maps, driving directions, weather reports, and much more. This site is a real time saver!