From Diablo Wiki
Diablofans.com, formerly known as Diablo3.com, is a Diablo fan website, similar to Diii.net.
Diablofans.com's previous domain name was given to Blizzard about a month before WWI 2008 and the Diablo III announcement. They asked for no monetary compensation, but instead got a permanent link on the official Diablo III website for about a month after the event. They acquired the domain "Diablofans.com", which they use to this day.