A suggestion: 
How about releasing Numpy for the AMD64 version first (without Scipy) and then follow up with a later release with Scipy support?  This would satisfy Numpy-only users which can't be a bad thing rather than having a version that is not usable (I believe) by either Numpy or Scipy users.

From: David Cournapeau
Sent: Thursday, July 30, 2009 8:15 PM
To: Discussion of Numerical Python
Subject: Re: [Numpy-discussion] Timeline for 1.4.0 and installer for Windows64bit ?

Hi Klaus,

Klaus Noekel wrote:
> Dear folks,
> just over a month ago there was a thread about plans for numpy, and IIRC
> somebody had volunteered to try and put together a working AMD64 version
> with an installer.
> Since then I have not heard about the issue again - but I may have
> missed part of the discussion. Have the plans firmed up by now? Is there
> a tentative date for a beta or RC? In particular: how much hope is there
> for a reasonably usable AMD64 numpy under Windows?

There were some discussion about pushing 1.4.0 'early', but instead, I
think we let it slipped - one consequence is that there will be enough
time for 1.4.0 to be released with proper AMD64 support on windows.

The real issue is not numpy per-se, but making scipy work on top of
numpy in 64 bits mode. It is hard to give an exact date as to when those
issues will be fixed, but it is being worked on.