I can't imagine Nintendo releasing all 5 colors in R1, but I'm leaning towards the Green. I think it's more likely Nintendo will release Platinum, Black and White in North America and reserve the other 2 colors for the Japanese market.
Either Black or White. I'll have to see them in person before I decide. Probably Black. Although the White intruiges me. The clencher will it be glossy? Like an Apple (Macintosh) White, or just boring white. If it's just boring 'ol flat white, I'll go with black. I don't need my systems in colors.
I would be very suprised if there is more than one color released in the begining, this would be really costly for them to do. I love the gloss black. I wouldnt own it but the green one is just freakin cool.