Skills of Druid Tanking
Mangle - Your base attack. Gives high damage, and therefore great threat, and also a neato debuff. Use as often as possible. Great for single target tanking
Lacerate - Druid Sunder Armor. Stacks to 5. Hits for very little,
but when it hits, it does a great deal of threat, no matter how low it hits for. Also applies a small bleed, which helps threat. Also great for single target tanking. Two applications of this will generally keep a mob off a healer for a while. Reapply as needed to keep the bleed up. Least affected by low Feral Attack Power, so easy for new 70s to use this to tank. But thats no fun.
Swipe - Hits three targets for a moderate amount of damage. Will break CC. If you plan on tanking 3 mobs with this, you'll need slightly more Feral Attack Power than 70 greens will give to keep aggro off the healer. So don't completely rely on it, throw in some Lacerates (more on that later). Sidenote: don't worry about spamming this for rage considerations, you get +rage for all three hits, and it generally will crit at least on one target, which gives even more rage.
Maul - Druid Heroic Strike. Does high damage, sometimes even more than Mangle. Note that it will not count as white damage, which means that it will not give you as much rage when it crits, and won't give you ANY rage when it doesn't. Spamming this will make you out of rage pretty quickly. Only use it when you are above 70& on your rage bar. Helps to give druids that bonus aggro generation, just be careful not to go out of rage.
Feral Faerie Fire - Great for pulling. Decent debuff. Better for PVP than PVE, so I mainly use it to help out melee dps and to pull.
Some meh skills: Demoralizing Roar (ragedump), Bash (PVP)
Feral Druid Tips and Tricks
Paladins get threat by spending mana. Warriors get threat by spending rage.
Druids get threat by doing damage. So when you're looking at gear, don't forget that you shouldn't nerf your damage too much. Else you'll be Lacerate spamming, and that's no fun.
Lacerate Macro: /cast [target=mouseover,exists] Lacerate; Lacerate
How to use it: target the kill target, pull, hit main target with mangle, mouseover secondary target and hit the macro. I put it on one of my extra mouse buttons and it works wonders.
Great Druid Gear for Tanking -
Badge of Tenacity -
http://thottbot.com/i32658
Braxxis' Staff of Slumber -
http://thottbot.com/i31186 (OMG GREAT)
That's it guys, post a reply if you have questions.
Savage