How can my entire party or group of friends join a Battleground together?
You can join the Battleground as a party or raid by forming the group and having the party or raid leader enter the queue by clicking the "Join as Group" button.

If I join a group that has already been placed in a queue, will I be placed in their queue along with them?
No. The group leader will have to re-enter the queue in order for everyone in the party to be placed in the queue.

Do I need to be in front of the Battleground instance while waiting in the queue?
No. Roam around and play! You can even run instances while in a queue -- you'll be given the option to port straight into the Battleground when the time comes.

Are there plans to implement alternate methods for joining Battlegrounds?
The next patch will introduce a new way to enter the Battleground queues. Battlemasters! They are located in some of the cities and right-clicking on them places your character in a Battleground queue just as if you had touched that Battleground's entrance portal.

What happens if I'm dead or in the middle of flying between two locations when my time to enter comes up?
Being dead or locked into a flight path will not hinder your ability to enter Battlegrounds once you're in a queue. Simply accept the invitation to join and prepare to be ported.

What if I'm in an instance when the Battleground time comes up?
If you are in an instance when it is your turn to enter the Battleground, you will still have the option to either port to the Battleground or remain in the instance.

Why does typing /afk kick me out of the instance?
Battlegrounds are a fast-moving PvP environment where it's important for everyone involved to remain active. Being idle or away from the keyboard can certainly hurt the rest of the players on your team by hindering their ability to complete important objectives.

Do the diminishing returns rules for contribution on honor kills still apply in Battlegrounds?
Yes. Defeating the same opponent repeatedly within a short amount of time will result in less contribution, until eventually none is received.

I want to tell my friends to join the same instance as me. How do I find this information to ensure we all join the same one?
When you attempt to enter the Battlegrounds portal, an interface box appears attached to the minimap - listing each available instance with a number.

When honor is tallied each week, are rankings from the Horde and Alliance independent of each other?
Yes!

How do insignias work?
Your character carries a team insignia on it that can be looted by enemy players when you die. When a player removes your insignia from your body, you can no longer resurrect at your corpse. In this situation, you must resurrect at a friendly graveyard. These insignias are invisible/intangable.

Is there a durability loss for dying to anything in Battlegrounds?
There is no durability loss for dying to a player or NPC in a Battleground. However, regular combat durability loss from normal use of your equipment is applied in the Battlegrounds. In addition, damage or death from environmental sources like fire, falling, or drowning will cause durability loss.

Article: PvP Gameplay in World of Warcraft

Player vs. Player Combat - Special rules for fights between Horde and Alliance

Surviving PvP - A seven page listing of random PvP tips

PvP Honor System Flash Introduction - The basics with flash

Interview: PvP Honor System and Rewards - An interview with a lead designer

Article: PvP Honor System and Rewards - An article explaining the Honor system

Ranks

Honor System Guide - More details and examples of the Honor System Calculations

Honor System F.A.Q.

Reward Armor Sets

Reward Weapons

Reward Mounts