Super Awesome Guild Rewards, or "Dark Phoenix is a Guild Mount!"

Perks must be unlocked by your guild, and your character must have an epic reputation with your guild to buy the best things.

Guild Buyable Mounts and Pets

• Dark Phoenix
• Baby Dark Phoenix
• Snail Pet
• Guild Mount (Alliance: Lion | Horde: Thunder Lizard)

Guild Buyable Heirlooms

• Helms
• Cloaks

Guild Buyable Extras

• Guild Bank Tab Claim Sheets
• 2 Cooking Recipes (compare to Fish Feast)
• Battle Standard - Common, Superior, Epic
• Guild Herald - Common, Superior, Epic

310% Flying

• 5,000g
• Free if you already have a 310 mount.

(source)