Stealth

Talents/Abilities
Feral Instinct (3/3) +15 stealth rating
Master of Deception (5/5) +15 stealth rating
Shadowmeld +5 stealth rating (passive)

Items
Figurine - Black Pearl Panther +3 stealth rating
Figurine - Nightseye Panther +5 stealth rating
Figurine - Shadowsong Panther +5 stealth rating
Nightscape Boots +5 stealth rating
Whisperwalk Boots +5 stealth rating
The Master's Treads +5 stealth rating
Silent-Strider Kneeboots +5 stealth rating
Darkmantle Boots +8 stealth rating
Boots of Displacement +8 stealth rating

Consumables
Stealth of the Stalker +8 stealth rating
Sneaking Potion +30 stealth rating

Permanent Enchants
Enchant Cloak - Stealth +5 stealth rating

Wowhead Spells
Increases your stealth slightly +3 stealth rating
Increases your effective stealth level by 1 +5 stealth rating
Increases your effective stealth level +8 stealth rating
Increases your effective stealth level for 5 min +8 stealth rating
Increases Stealth a great deal for 1 min +30 stealth rating

Excerpt from Druid Guide, Part 1: Overview, Class Mechanics, Leveling

Stealth decreases the range at which players and mobs can see you (and thus, react). Druids have an invisible "stealth skill" called Subtlety that doesn't appear on their character sheet and always increases by 5 for each level (thus at level 70 you have a base Subtlety skill of 350). All characters also have a Stealth Detection skill, which also doesn't appear on their character sheet and always increases by 5 for each level (thus at level 70 you have a base Stealth Detection skill of 350).

At equal levels of Subtlety and Stealth Detection, a stealthed character can be seen 5 yards away. Each 5 points of skill changes that range by 1 yard either way, up to a maximum of 10 yards and a minimum of 1 yard. So for example:

• If a stealthed cat has a Subtlety of 350, a Stealth Detection of 340 could only see him 3 yards away
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• If a stealthed cat has a Subtlety of 350, a Stealth Detection of 365 could see him 8 yards away
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• If a stealthed cat has a Subtlety of 5, a Stealth Detection of 400 could see him 10 yards away

Keep in mind that Stealth Detection only works for your frontal 180 degree cone. A level 1 cat could sneak up on a level 70 human warlock with Perception popped, Hyper-Vision Goggles, a Catseye Elixir, and a Felhunter out, and still be undetected as long as the cat approached from behind.

Additional information at wowwiki

Cata part of Wowhead says this is changing to +8 Agility and +8 Dodge.

Stealth

If that's accurate then this will be one of the best enchants for new heirloom cloaks.

Good enchant for Inherited Cape of the Black Baron