Being that I'm an owner of the very BlackBook described...
and having owned the MB 2.16 120GB Mid-Range White, I can honestly (not sure if I should be using this word) say that keeping the WMB clean and presentable was WORK, I was constantly scrubbing with the "Magic Eraser" and went through two small bottles of "iKlear" and that was one of the reasons the Apple Store Manager that exchanged my MB for my current BlackBook said that my White MB was immaculate!
I originally went with the WMB 2.16 because the BlackBook was $200 more for just the color (I was willing to forego any remarks about my feminine side), but the 2nd time around (Wed Feb 27, '08) the Apple Store didn't have the configuration that I wanted, which was the MB 2.4 250GB, so I asked if I can have the BlackBook with those same specs, but at the WMB price? There wasn't even a pause, when the manager agreed to my request. I did notice a $300 Store Discount on my receipt. So, be aware that most Apple Stores don't have the White MB in the 250GB HHD, and they will probably stick to their guns about the price of the BlackBook, and if you want the WMB with 250GB HHD, you'll probably buy it on the spot and then they'll go in the back and put one together for you, especially after my deal. 😎