The other reference to flying monkeys is the intro to "creating custom monsters" in the DMG. (And I consider Fierna's quote an easter-egg despite being an obvious pop-culture reference, because it's not a reference to Fierna's culture; it means something to us but not in the context of the actual product.)
The table of tavern names in the DMG has several other interesting rows. Row 1 is from a prominent actual-play report for Lady Blackbird. Row 19 is the villain from the starter set.
On page 135, "If you want a ring of invisibility to fall into the hands of a 1st-level character, so be it. No doubt a great story will arise from that event."