Hi Lesley,
In order to check-in online or make dining advanced dining reservations on the Walt Disney World website, you will need to contact Travel City Direct to request your US confirmation number. This is a very common request and shouldn't cause you any difficulties.
To help you with your planning, you can watch Disney videos online which let you explore the parks, resorts and more
HERE as well as being able to view the 2011 brochure online and order a copy of the Little Big Book of Magic guidebook which contains pull out maps and insider tips to help you get the most from your trip.
Unfortunately, you must be 18 years or older and live in the United States to order customized maps for home delivery but you are able to create the maps on the Walt Disney World website and print them off at home.
I hope that this helps with your planning and would be happy to answer any other questions which you may have here at the Mom's Panel.
Wishing you a magical holiday