Karen Wynn Fonstad, the author of (among other works) 
The Atlas of Tolkien's Middle-Earth, passed away on March 11, 2005.  
For more information, check out these links:
Planet Tolkien's announcement 
The One Ring's announcement 
Her work in charting and drawing maps of Middle-earth has been an important resource to Tolkien fans worldwide, especially helpful to those who write fan fiction and RPGs.  She was also a member of the Éowyn Challenge site's "Walk to Rivendell", where her maps provided the mileage information for many walkers.
We owe her a great debt of thanks; may she rest in peace.
		
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				'Mercy!' cried Gandalf. 'If the giving of information is to be the cure of your inquisitiveness, I shall spend all the rest of my days in answering you. What more do you want to know?' 'The whole history of Middle-earth..
.'