I have just got this from Nokia:

we still dont have the exact release date for the Nokia N900; but since you pre ordered it
you'll be one of the first to receive it after it's released. As soon as the product is in stock, we'll process your order and take your payment.

If the product doesn't become available within 30 days of you ordering (the pre-order expiry date), we'll contact you to:

a.ask if you want to cancel your order, or
b.if feasible, provide you with a substitute product of the same quality or price.


Please don't hesitate to contact us again if you have any further questions.

Yours faithfully

I do not want a substitute product!!!