Interesting post.
I'm of Indian-origin, fell quite ridiculously in love with my Asian bf, lost my virginity to him, and then he dumped me for reasons that I still don't understand.
Also, my best friends are of Asian origin, and while I can't generalize, I have to say that they prefer white women (they're straight). They are not racists by any stretch, quite the contrary. But as for attraction, only white women do it for them.
Also, from what I hear, if you go to China (or Thailand, Taiwan, South Korea etc), then skin color really matters. You have a sample of this, albeit biased, when you go to an Asian chat-room. Even though the language barrier takes some effort to overcome, their preferences are clear. White skin and blue eyes. One of my online friends from China runs after white guys, one after the other, often to be disappointed.
I won't call American Asians racists, because from my experience, they are kind and open minded. I do feel, however, that they have a strong preference for Caucasians. As for Asians in Asia (talk about being redundant), issues like racism hardly even occur to them. Whites are prized boyfriend material in straight and gay circles.
So, well, sorry for my disjointed thoughts. After seemingly contradictory anecdotes, let me say this: Asians and blacks not mixing is bull-crap. My bf didn't care about skin color. Not one bit. There have to be others like him, and with a billion Asians, the odds are quite good.