According to AppleInsider, Apple told Best Buy to stop taking white iPhone 4 pre-orders. You can see that story here.
So what does this mean for those who got a white one ordered before the buzzer?
From what I can tell based on an informative forum post or two, is that Best Buy has no idea what colors its getting. It will find out on the 23rd when the shipments come in, and then call up those with pre-orders to set up appointments. So there's no confirmation that they'll get any at all. If I had to guess, if there are any released at all, it won't be at a 3rd party retailer. Check out a forum post discussing Best Buy pre-orders here.
Well, that's all for now, white iPhoneers. I'll check back in soon.