One of a very few entirely visual Easter eggs, this one isn't very obvious unless you poke a little further around Nesingwary's Camp in Nagrand. A downed plane with an Undead mechanic occasionally wrenching on it, and - what's that crawling around the plane?
This goblin east of Area 52 gives you a highly entertaining quest involving a robot. So what's the Easter egg portion? Reverse his last name.
Area 52 (and most of Netherstorm, come to think) is chock-a-block with Easter eggs, and there are a few quiet standouts. One that I couldn't seem to get a decent photo of concerns the two goblin children running around the northeastern portion of the town (look 'em up!), and another is the name of the elf Ravandwyr's familiar. Ravandwyr is a fairly moody sort, so it stands to reason he's in good company with Sagan, who shares a name with a famous astronomer who took little on faith, and also knew the subject of our last Easter egg.
One of the first sights to greet new Horde players in Outland will undoubtedly be Floyd Pinkus, innkeeper to the musically-inclined.
Clint Eastwood, eat your heart out. You can find "Dirty" Larry, one of the objects of a long quest chain, at the end of Lower City beyond the arrakoa encampment.
Down the hill from Toshley's Station in Blade's Edge (itself an Easter Egg but a more obvious one than this, with both "Star Wars" and "Starship Troopers" references) is a little robot by the name of R3DO. He's fluent in two languages! Very impressive.
Drysc, one of the high-profile forum CM's, can be seen wandering around the Exodar in company with a Broken (who's attempting to teach the principles of shamanism; follow them around for a little bit) and a fellow student. Look for them walking around the Crystal Hall.
Eyonix, another well-known CM, turns up as a Consortium innkeeper in the Stormspire of Netherstorm.
No doubt you've heard the nearby orc yelling about his displeasure with this kindly-looking merchant. This is probably the most obvious and visible Easter egg in the game, although on occasion I've been surprised by a few people (usually those without the need to buy reagents or pet food at nearby vendors) who don't know about her.
This is one of my two favorite Easter eggs in the Burning Crusade, although it's also one that I don't get to enjoy all that much as my main is Horde. In Telredor, the main Alliance outpost in Zangarmarsh, you can find a master engineer by the name of K. Lee Smallfry, which elicits a big /cheer from those of us who were "Firefly" fans.
If this guy doesn't get some Famous Theme Music pumping through your brain as you step into the miasma of trollage that is Zul'Aman, I'm not sure what will.
One of the better-known Easter eggs of WoW (even if I rarely see anyone mention her pet - click the dog!), Haris Pilton awaits your visit in the World's End tavern of Lower City.
The wyvern mistress at the Horde's tiny Spinebreaker Post in Hellfire has a name very similar to a famous, if tragic, American flying ace.
All "Simpsons" references are by definition good, and here's our beloved groundskeeper in a somewhat more attractive form.
I confess I didn't know about another "Simpsons" reference in the game until very recently (I don't have a skinner at 70 yet), but this is another Lower City resident whose origins should pretty much be a gimme.
Silvermoon is a city home to a number of magical constructs, but none more familiar than the industrious little brooms known to anyone who's seen "The Sorceror's Apprentice" from Disney's "Fantasia" (1940).
Not too many people saw the 1996 movie "Biodome" - said to be among the worst-reviewed films of all time - but I doubt that'll keep you from recognizing the goblin in Eco-Dome Midrealm.
My main is a level 70 Tauren Druid, so naturally I don't have, uh, ready access to Alliance towns and cities. The skeleton you see in the foreground belongs to yours truly (after an unfortunate brush with a guard knocked me out of stealth). Any closer and I'd have been playing with fire again, so this isn't the best picture ever, but here's Marshal Isildor, head of Alliance military efforts at Honor Hold and bearer of a distinctive, Tolkien-inspired (and possibly foreshadowing?) name.
If you haven't seen the various Will Ferrell spoofs of "Jeopardy!" from his days back in SNL, you really should. With "Potent Potables" turning up under Dealer Sadaqat's name in the Stormspire, it's apparent the devs remember them.
At the downed zeppelin in Hellfire Peninsula you'll find a suspiciously-named goblin with an interest in cooking -- and he seems to make inventive use of the freshest, locally-available ingredients. Which, when you consider what constitutes "local," is really a shame.
When I first reached Area 52, I didn't make the connection between these black-suited sentinels and "Men In Black" until stepping through the doorway. Try it, and make sure you read the text from the little debuff you get.
The small Alliance post at the Temple of Telhamat in Hellfire is hosted by an innkeeper who wants you to reach your fullest potential, lose weight, and not incidentally, join her book club.
The goblin arena master outside Nagrand Arena bears a name worthy of those who arrange high-profile fisticuffs. If you had any doubts, there's a nearby ogre named Ear Bitter.
This charming fellow is yet another inhabitant of the Stormspire and gets his name from the 1988 film "Action Jackson."
If you've read the enormously popular webcomic "Flintlocke's Guide to Azeroth" (which was, much to my regret, discontinued; you can find the archives on Gamespot), you'll know of Flintlocke's seemingly endless quest for the ultimate Goblin-Engineered Weapon. Well, dang if it doesn't turn up in the game. This is my favorite Easter egg because there's absolutely no overt reference to it in the game at all. It's tucked away in a little-seen corner of Area 52 (off to the side of the eastern entrance) and even diehard Flintlocke fans don't usually realize it's there.