My wife and I are planning a trip around the world. It's been pretty complicated so far. Just getting that amount of air travel figured out has been difficult (mainly because the Star Alliance RTW tool appears to have a recursion depth of 1...). We're just now working on booking places to stay, tours to take, shoehorning various experiences and adventures into the spaces between flights.
Convince me to use your site. What significant advantage will it have over a spreadsheet full of travel plans? Over a blog with pictures and a google maps widget? What does "semantically meaningful" mean to me as a traveler? Do you mix in current data (travel warnings, visa requirements, etc.) with my plans so they are relevant at later dates?