WOW brewfest is based on Germany's Oktoberfest !

Brewfest is a new holiday event in World of Warcraft that will run October 2-16th. Based on the German Oktoberfest tradition, Brewfest quests can be completed for tickets, which may be exchanged for Bavarian-style costumes, collectible steins, and even a ram mount, which will be highly desirable to Horde players. This guide provides a quick breakdown of the Brewfest quests and repeatable dailies to help you get your new mount, non-combat pet, and eyesight-enhancing goggles. For more information and screenshots, you might want to check out MMO-Champion's Brewfest guide.

Where do I go?
Most of the quests are located in Durotar for Horde or Kharanos for Alliance. There are also Brewfest beer gardens located outside Silvermoon City, Darnassus, Undercity, Stormwind, Thunder Bluff, the Exodar, and Shattrath.

Brewfest Events
Dark Iron Dwarf Attacks
Dark Iron dwarves will try to steal the Brewfest Kegs every hour. Pick up a Complimentary Brewfest Sampler, drink the contents, and chuck the empty mug at a marauding dwarf. Each Dark Iron attacker you hit will earn you a Brewfest Ticket.

Brewfest Quests
Catch the Wild Wolpertinger
Wolpertingers are invisible jackalope-like creatures. Essentially we're talking a rabbit with antlers, wings, and a set of tiny fangs. This quest will reward you with your own Wolpertinger Tankard, which houses an adorable noncombat pet that is only visible to you or to characters who are drunk. To catch the wild wolpertinger, first drink enough to get your character totally wasted. You'll have several seconds of "completely smashed" to target the wolpertinger before you need to drink more to be able to see it. Tip: to see the wolpertinger more clearly, you might want to go into your video settings and temporarily turn off the drunk effect by switching off full screen glow.

Now This is Ram Racing... Almost
Learn how to ram race with this quest. (Tip: be sure to pick up your Ram Racing Reins from the apprentice standing next to the quest dude.) Your ram steed has four speeds, but can get fatigued if you make him run too fast for too long. Keep an eye on your ram's Fatigue debuff -- if it gets to 100, you'll have to stop for 15 seconds. Keep clicking the reins to shift between speeds. You can also run your ram by an apple bucket to remove the debuffs. After you complete this quest, you can do more races.

Did Someone Say, "Souvenir?"
Turn in your voucher and receive a Brewfest Stein from the festival greeter. Each stein type has a corresponding keg from which you can refill your mug.

Pink Elekks on Parade
Pick this up at the main festival grounds, along with Catch the Wild Wolpertinger. For this quest, you'll have to travel to each of the three other festival beer gardens for Alliance or Horde, get drunk, and chase off the aforementioned Pink Elekks. 75 tickets for completing this one.

Seek the Saboteurs
After a Dark Iron Dwarf attack, you may notice a set of Dark Iron Sabotage Plans on the ground. Loot them, and you'll get this quest to find Coren Direbrew in the Grim Guzzler in BRD. He's hiding in the bar behind the plans seller. Reward: Dark Iron Tankard (a level 54 off-hand which you can drink from).

Brewfest Daily Quests
There and Back Again
This is a delivery quest with a build-in time limit. Pick up the quest at the festival grounds, and you'll be given a racing ram. Head into the nearby town (Kharanos or Durotar) and grab a keg from the NPC standing next to the stack of barrels. Run your ram back to the festival and drop off the keg. The first time you do this quest, you have to deliver three kegs in four minutes, which will earn you 15 Brewfest prize tickets. After that, the quest will give you five tickets for each keg you deliver in the time allotted, with bonus time added every time you deliver a keg. You should be able to get 40-50 tickets a day this way.

Bark for the Barleybrews!Thunderbrews/T'chali's Voodoo Brewery/Drohn's Distillery!
These repeatable quests require you to take a ram to the four Brewfest flags (the ones with the big mugs on them) in Ironforge or Orgrimmar and promote a given brew. Since these quests were bugged on the PTRs, it's unclear whether you can complete the quest for both of the rival brewers, or if you have to pick one. Either way, completing one of these quests will earn you 50 tickets.

Brewfest Rewards
600 tickets - "Honorary Brewer" Hand Stamp
This stamp certifies you as an official Brewfest ram rider, allowing you to purchase both the normal level 40 Brewfest Ram (for 10g) or the Swift Brewfest Riding Ram (100g). The mounts are permanent, and are the same for both Horde and Alliance.
100 tickets - Eyesight Enhancing Romance Goggles ("Guaranteed to make EVERYONE look attractive!")
Equip these goggles, and you'll view every character or NPC you meet as either a gnome (Alliance) or orc (Horde). Sadly, the goggles have a 7 day duration.
Other, less awesome things to redeem your tickets for: Brewfest Pony Keg, Brewfest hats, Brewfest regalia, various food & drinks.