I think that Every Day I'm Pand-a-ren is more of a reference to the song "Party Rock" by Lmfao and the line, "Every day I'm shufflin'". I could be wrong, but I know the Pandaren dance is based off that song as well, so. /shrugAwesome list though!
This article is based on achievements, not items/weapons.
I always figured "Ragnar-Os" was a ref to Spaghetti-Os, not Cherrios.
RE : Under "Iron Maiden""Hallowed by thy name" is also the 3rd line of The Lord's Prayer.
Awww. How could you forget 'It's over 9000!"
There is another possible one: The 'Hills like white Elekk' achievement. There is a 2002 short movie called Hills like white elephants featuring Benedict Cumberbatch. However it may be a stretch or from another adaptation of some kind but it might be worth checking in to :).
There is a quest in Jade Forest called "Stay Awhile and Listen" which i'm guessing would be a reference to Dekard Cain from the Diablo series. Also, just a guess, but Kun Lai may very well be named after the mystical city of Kun Lun where the Marvel superhero Iron Fist is from. Not positive, just a thought.
And They Would All Go Down Together (10 player)10/25 man versions are from the chorus of ''Goodnight Saigon'' by Billy Joel (and we would all go down together)
Mighty Roamin' Krasaranger is a reference to the TV series, Might Morphin' Power Rangers.
Just remembered, and other things. How about this: What Does This Button Do?.While I'm sure someone might think it's from something else.I'll remember it from the quote DeDe says in Dextor's Laboratory from Cartoon Network. :)