According to the Marathon page on the Whaling Museum website:
Beginning at midnight [Eastern time] on Tuesday, November 11, interested individuals may email or call to request a 7 to 10 minute reading slot.New this year, a sponsorship scheme. "Selected readers" will be "challenged to gather sponsors to support their participation in the Moby-Dick Marathon. In return, sponsored readers become eligible for prizes based on the level of support they generate." As we've said before, the MDM is always evolving.
Note that if you're at the MDM during the "Graveyard Shift," and if the weather is bad, you usually have a good shot at the podium as a standby reader.
Lemuel's series, How to Be a Good MDM Reader, might be of interest.