I just received that exact same email. Not sure if it means I didn't make the first batch or not. I ordered about 4 hours after the initial announcement, so I won't be too surprised if I did miss it.
Just received an email from B&H related to my 5DMk3 Body order:
You placed order #xxxxxxxxx on 03/02/12.
One or more items from this purchase are still out of stock as we haven't yet received the merchandise from our supplier. We are sorry for any inconvenience this may have caused. We will keep you posted on a weekly basis.
We appreciate your patience and patronage. Feel free to contact us with any questions or comments about this order.