I've just spent the last little while being sucked in to the debate about whether Atari really did bury all those ET cartridges in New Mexico back in the day. There are a number of conspiracy freaks over at the Atari Age forums claiming that it's all urban legend etc. and wanted proof. So a collector from Dallas took a road trip to Alamagordo Mew Mexico to track down some of the people that may have been involved. There are old newpaper clippings scans, satellite images, blair witch type videos with interviews of the sanitation workers that worked in the dump  etc.... It's a real hoot.
 
You can read the 13 pages of posts at:
 
http://www.atariage.com/forums/index.php?showtopic=66637
 
Someone put together a synopsis page at:
 
http://www.stingraysmadness.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=96
 
Article from Apr 12 2005
http://www.alamogordonews.com/cgi-bin/artman/exec/view.cgi?archive=499&num=7487