I think black would look cool as well but to be honest I love the white. Plus black shows every single scratch, scuff, and wear mark while the white does a prett good job of hiding those. You just have to keep the white clean which is not a problem, for me anyway.
I just sold my Black Mackbook and it was hard to see it go, but the unibody is so much better I had to. Now if this white unibody was in Black I'd buy it over the alu unibody .... if they would put the backlit keyboard on it. That would be perfect.
I have a black macbook I think it maybe one of the last made before the stopped and decided to only make white. I love it and all my friends with white macbooks want mine. My only slight complaint is keeping the oil smudges off it and you can see where I have worn the keyboard