I know it's a bit late, but I have 2 godmothers! And 1 godfather. One of my godmothers met my mum while travelling in Europe, and mum made some comment about her making a great godmother, and she held Mum to it when I was born, even flying over from NZ for my christening! I have hardly seen her since, but in the interests of tradition I have promised a NZer that I met in Europe that she can be godmother of my firstborn.
My other godmother, who is a Sydney-based raging wild party animal, had a lot more influence on my life. I talked to her about girls stuff a lot more than I did to my mum.
So I say go for it, then the bubba can have the choice!