UPDATE: Pilgrim's Bounty is now live on my server as I write this at 4:30 AM EST Sunday, and this guide has been updated. We've also written a Pilgrim's Bounty FAQ to answer the more common questions we've seen concerning the holiday.
Pilgrim's Bounty is a brand-new holiday that in 2009 will run between 1:00 am server time Sunday, November 22nd and 11:50 pm server time Saturday, November 28th. Because it's new, expect to see this post updated extensively in the 24 hours after the holiday goes live. We'll have new information on quests, items, and vendor locations, plus screenshots of WoW's newest holiday.
As an FYI, Pilgrim's Bounty is not part of the yearlong meta What A Long, Strange Trip It's Been, so if you fall short on any of the achievements below, you're not running the risk of having to wait another year for a crack at a violet protodrake. However, you will miss out on the Pilgrim title and plump turkey pet that are rewards for completing the Pilgrim meta.
Let's get started!
"FOOD FIGHT!" (Alliance) and "FOOD FIGHT!" (Horde)
This is a pretty simple achievement. The Bountiful Tables located around each capital's feasting area (all of them are very large and easy to spot) are actually vehicles. Each of the 5 chairs at the tables is dedicated to one of the specific dishes (mouse over them and you'll see them named "The Stuffing Chair" or "The Turkey Chair"), but for this achievement you don't need any particular food. Take a seat, target a fellow player at the table, and use the first option (to "pass" a dish), and rather than passing the dish you'll smack them over the head with it and get your achievement.