If you go on the official marathon site, you can download the race booklet for 2010, which is full of helpful information such as the following:
Monorails will run on race morning between the hours of 3am and 4am to get race participants to the start of the race. You must board the monorails before 4am in order to be at the race on time.
Buses will operate from all non-monorail resorts and will run between the hours of 3am and 4am. The last bus will leave the resorts at 4am, therefore participants must board the buses before 4am in order to be at the start on time.
Here is a link to the pdf copy of the 2010 race booklet. This is the same booklet you will receive when in your race kit when you get there for the 2011 marathon. Read through this past year's book. It will answer a LOT of questions. I'm not running until 2012 but I found this book to be dead helpful in answering my questions. Here the link
http://adisneyworldsports.disney.go...urSports/PDF/Endurance/WDWMarathonProgram.pdf