If you look at this link http://www.cadwire.net/commentary/?40521 there is an 
article from Randal Newton who spoke with the ceo of the company involved.

Headers from the confirmation email some people received had Message-ID: 
<258c01c5711b$67d364d0$140d000a@AlibreHost.alibre.com> in it
Alibre is a reputable cad company.

Take it for what it's worth

Peter van Hoof

----- Original Message ----- 
From: "Josh" <joshuajordan@adelphia.net>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Monday, July 18, 2005 6:49 PM
Subject: Re: [OT:] X-cad


> Peter van Hoof wrote:
>
>> Did anyone mention the X-Cad 3d cad giveaway on http://x-cad.net ?
>>
>> They give away a 3d cad package IF 100.000 PEOPLE SIGN UP BEFORE AUGUST 1
>> Right now the count is at 89550 with almost two weeks to go it should be 
>> possible to reach the goal
>>
>> Peter
>>
>>
> Is this legit?  I think it could be an elaborate scheme to harvest email 
> addresses.
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