ITA with all...and more...I'd be posting a saga if I answered you in depth.
Leeleerae, IMHO, no matter how badly you want something from HH that is available only as a pre-order, until we (and the public) know a bit more specificics regarding the manne in which their orders will be processed from start to finish, including overselling, and delayed ship dates, and most importantly, communication with customers rather than the "due to circumstances beyond our control" BS that has gotten very stale, I might advice you to stay away from pre-orders.
What I believe it means specifically is that they may not have produced it yet and may be waiting to see how many units to produce in a run of specific colors. No matter what the state of the economy continues to be, from a purely practical business POV, it makes sense to produced items with less overage. In this manner, items could be sold at a controlled discount directly through HH and not through a designer discount site if there are overuns that have to be dumped to raise working capital.
So...HH does not have it in stock, and it is possible, despite your deposit, and despite a "headcount" of the pre-orders, that HH may oversell it or not produce enough to meet later demand if it is too close to switching production to the following seasons', unless that style and color story is going to be carried forward. You might get yours depending on when you placed the order and even the discount which you used to purchase.
You are savvy, Llr, so if you do preorder, keep really good records because it will probably be up to you to keep track of everything. HTH.
TTFN amigas.