Mamenori

Mamenori is soy bean paper, an alternative to the use of nori sheets when making sushi rolls or even for spring roll wrappers or rice paper. Being made from 100% soy beans, it's a good alternative for sushi lovers who may either be allergic to or just not like the taste of nori. It seems to have become popular recently in the U.S. for the more non-traditional sushi rolls, such as those containing meat rather than fish. It comes in a rainbow of colors (green, natural, orange, pink, yellow) and is typically about twice the price of nori sheets.

from Cooking Cute:

"Nori is delicate and crisp, while mamenori is pliant and more durable. Its texture reminds me of a thin, non-sticky fruit roll-up. The taste is different too, with nori a bit on the salty side and mamenori a bit on the sweet side. Mamenori also behaves a lot differently than nori when used to lay a design on a hot bed of rice. Nori tends to shrink a little, but the overall proportion of your design will remain the same once the nori is done shrinking. Mamenori, on the other hand, curls like all get out."

Unfortunately I didn't happen upon this myself, rather was introduced to it by a friend as "some sort of pink nori wrap," but at least I now know to look for it. Sushi-making weekends should become even more interesting than intended if I can just get my hands on some mamenori.