It's true...the Dolphin name will live on with Nintendo's new console, games, and accessories!
One sort of minor but cool thing to note...but the serial #'s for Nintendo's new love have a much deeper meaning...
GameCube: DOL-S-VTA (JAPAN)
GameCube controller: DOL-003
Memory Card 59: DOL-A-MLG (JPN)
Luigi's Mansion: DOL-P-GLMJ (JPN)
Basically all launch items have the DOL as the first three characters.
DOL seemingly be referring to Dolphin. Gotta love Nintendo! Or I guess some could always say it refers to Dolomite, but I doubt it.