Please note: This is a post from 2004, and since that is a few years (and FanPro is no longer the publishers of record for Shadowrun) ago, I have deactivated the link and comments to this post. Not everything on the Internet is forever. :)
I am sure that this is a limited time offer, and since it is dated the 24th, people should probably try to take advantage of this as quickly as they can. Free is free, after all.
Official Shadowrun Site
"December 24th, 2004. Happy Holidays! FanPro has made several out-of-print products available for free download in PDF format. You can download them directly from our site."