Obama has described his grandmother as the cornerstone of the family, and movingly spoke of her while describing his strong support of women's rights. I'm sure her influence will be felt in his leadership in the coming years.
Condolences for Obama Family can be sent to:
Re: Mrs. Madelyn Dunham
In care of: Obama for America
1050 Ala Moana Blvd Ste D2690
Honolulu, HI 96814
Of course, you can also honor her in another way -- by continuing to ensure that her grandson is elected tomorrow.