"Can I change my screen name to "Big Kahuna"?"
Better not.
You'll get angry radical Native Hawaiians saying they are outraged at your disrespect.
http://the.honoluluadvertiser.com/article/2004/Feb/05/ln/ln24a.html
From one who knows.
Yes. I figured that out the first time I went there. :D
How about King Kamehameha instead???