Official Blizzard Quote:
Diablo: Join us on our new 20th anniversary site as we celebrate 2 decades worth of games and players who made it all possible: http://bit.ly/ebALN6
In addition, G4TV put up two articles outlining some pretty cool things about Blizzard's 20 year anniversary (here and here) that showed somewhat of a timeline dating us back before The Lost Vikings, which definitely brought back some memories...
Nah, jk... I just wanna thank Blizz for all the great games they let us play along those past years.