There was a levequest in Thanalan in 1.0 called "Get to the copper", a reference to GET TO DA CHOPPA

And there is a level in LL for CUL named "Made by Apple in Coerthas", a reference to "Made by Apple in California" (Apple products)

AAAAND "Quake me up before you O'ghomoro" references "Wake me up before you go go"