In case it's not yet been posted, Human Events has a copy of the fateful fax posted here: http://humaneventsonline.com.edgesuite.net/unfit_pdf.html :
with this statement:
Kerry, Democrats Try to Scare Stations Out of Airing Vietnam Vets Anti-Kerry Ad
Lawyers for the DNC and Kerry-Edwards sent this letter to television station managers, claiming the Swift Boat Veterans For Truth ad (click here to view the ad http://humaneventsonline.com.edgesuite.net/unfit_video_wmv.html ) is "false" and "libelous."
A thread has been started for that fax:
http://www.freerepublic.com/focus/f-news/1185713/posts