After looking through various Japanese sites, I was surprised to see Casio posting this model on it's US site. Just for the heck of it, I went to Macy's Herald Square on Wednesday thinking, "It won't be there." I was surprised to see three of them. And when I was told the price was the same as the orange GW3000B-1A, I was shocked (no pun intended).
Owning the 3000 for a couple of weeks, I can say the 3500 is more user friendly, although IMHO not as cool looking. I'll do a full comparison soon.