Take the following for what it's worth:
I was in CompUSA today getting a price adjustment for the drives
I bought the other day. No problem. There was a guy there
asking about the drives, and when he was told there were no
more (this was only minutes after they opened), he started
to throw a fit, at which point the general manager of the
store came out.
The GM told him that they had no more, and didn't expect to get
any more. I mentioned at this point that the Web site was
still showing availability by mail order. The GM told me that
he was with corporate (according to him, he was only temping
as GM to "get the store in order"

, and that the drives were
(and I quote) "backordered to the sky...We're not going to get
more, NO ONE is going to get more. And what I've heard from
corporate is that most of the on-line orders are going to get
cancelled."
Now, this may or may not be true, but the guy didn't have any
reason to lie. Take it for what it's worth.
Kwad