Mainlanders may be unfamiliar with the local delicacy. According to the pool report, "spam musubi, a local luncheon specialty, consists of spam and a fried egg on a bed of rice, all held together with a dried seaweed wrap. (Visualize a very big sushi role, slightly larger than a Hostess Ho Ho.)"
Here's a little history on the Hawaiian love affair with Spam, sometimes referred to as "The Hawaiian Steak." According to Wikipedia, Hawaii consumes the most Spam per capita in the United States, and it was first introduced to the island during World War II.
Since fresh meat was difficult to get to the soldiers on the front, World War II saw the largest use of Spam. GIs started eating Spam for breakfast, lunch, and dinner. (Some soldiers referred to Spam as "ham that didn't pass its physical" and "meatloaf without basic training.") Surpluses of Spam from the soldiers' supplies made their way into native diets. Consequently, Spam is a unique part of the history and effects of U.S. influence in the Pacific.
Watch this instruction video on the making of spam musubi: