Link: Trip Planner - Yahoo! Travel.
Here's a cool little doodad from Yahoo. I just stumbled upon it as I was printing out directions for my SoCal sojourn. You can make your own itinerary on the fly as you browse travel options, keep it private or make it public, and subscribe to its RSS feed in your news reader of choice. It is also a social service in that you can share your itinerary and browse those designed by other people. Nifty!