HI!! We stayed at BWI last year and are staying back at BWI again this year for the 2006 marathon

. I thought we would stay on the monorail if & when we went back to Disney for the marathon, but I couldn't bring myself to stay anywhere but an EPCOT resort. I believe you have to catch the monorail by 4am if you stay in a monorail resort, same time as the buses (3am-4am) to be at the start.
We did walk back thru EPCOT after the race instead of catching a bus back to the resort. (You do have to have a park ticket of some sort to get into EPCOT after the race.)I enjoyed this walk--got rid of some lactic acid and also got to cheer on the runners still on the course.
ONE LAST THOUGHT....If we had any family/friends joining us this year to cheer I would have booked a monorail resort. It is very, very difficult to get around the morning of the races and that is by far the easiest transportation method for spectators. Last year my family got STUCK and didn't make it to any of our designated points--until mile 24

It was very disappointing for all of us. This year we won't have a crowd with us so that wasn't built into my decision process.
about the start...I think we caught the bus around 330a, we were at the first staging area around 4am. (Last year it was warm so we were good in that regard but I would be prepared for COLD weather w/ blankets and layers that I can easily dispose of at the start. Disney picks up all clothes left behind and donates them) Anyway, there is LOTS going on at the staging area to keep your mind occupied and we brought our light breakfasts and ate. They start the round up to walk down to the corrals about 445a? you walk maybe 1/2 mile to the starting corrals where you wait out the last hour to the start. There are lots of port o potties all along the walk but people also use the "trees" to avoid the lines. Once in the corrals there is music and motivation all around so it is "hype" up time! Anyway, the time didn't seem to drag for me like I thought it would. I still don't relish the thought of getting up at 3am but we signed up to run again in 2006--can't wait!
hope this helps...I would get on your resort reservations, lots weren't avail when I booked mine. Good Luck.