This may not apply to you, but if anyone is staying in Ebisu and wants to go to Disneyland, you can skip the incredibly long walk thru the bowels of Tokyo Station to the Keiyo line...

From Ebisu you simply take the Saikyo line toward Omiya which then becomes the new Rinkai line. Take this all the way to Shin-Kiba and you are just one or two stops to Maihama/Disneyland on the JR Keiyo line. Its probably a bit more expensive since you go JR to Rinkai to JR, but well worth the reduced wear and tear on your feet (you will get enough of that at Disney!).