I saw that story yesterday as well, so sad to lose someone so young. He helped design his own weapon, own mount, and the aforementioned Mulgore quest. I read that he was the insipation for the Hallow's End brooms as well..
Ezra Chatterton passes away - WoW Insider
Yes, Make-A-Wish and Blizzard do things right, glad he got that experience and will be forever remembered in WoW..