FYI for anybody who is still trying to snag some, Best Buy is currently accepting orders again for the Silver - no shipping date, just says Backordered. I feel better about it than the apple 12-16 week estimate for some reason, maybe since earlier today it was not available and then I suppose they re-enabled it, potentially indicating they have some other expected stock to sell.
At least, that's what I'm going to try to find out! I placed an order (this time on behalf of my mom to give to my brother) and will update y'all if I hear anything from them on it soon..my (optimistic) assumption is that on release day there will be some more stock released in all these stores or new ones so this would either ship then, or I'll try to find it for pickup in Apple or another store and cancel it.