I stumbled onto a free resource for planning travel and coordinating itineraries.
TripIt
In my "corporate career", my boss traveled probably 80% of the time. My number one frustration was to quickly combine all the various travel reservations, maps and information into something easy to handle, forward and archive. This looks like it will accomplish a lot of things I wanted then.
I currently do not have clients that I make travel arrangements for but perhaps someone with traveling clients will give it a whirl.
Here's blurb from the website:
TripIt is a personal travel assistant that automatically organizes all your travel plans.
TripIt is free and makes it easy to...
Quickly organize all your travel plans -- flights, hotels, cars, trains, cruises and more
Automatically get itineraries with all your plans, weather, maps, restaurants and more
Easily access your itineraries via paper, email, personal calendar or mobile device
Share your trips and see where you overlap with friends and colleagues
Hope this helps someone!