When I bought my first iPad (first generation), while in Kuwait, it only came in black. Last summer, while I was back to the US, I bought the iPad2. I got the white one so that I could easy tell the difference between the old iPad and the new iPad. The old one I passed down to my wife, and of course, I kept the iPad2 for myself.
I like the white iPad. I haven't had any problems keeping it clean, even though I travel around the world with it. I use it every day, and the white is fine.