Funny you mention this :P I had a "Nature Craft" idea that a room mate and myself brain stormed. We tossed it onto the main site, got a few hits, that was about it though. I can stick it here for you to poke at, just for the heck of it though.
-Various Bows
-Various Arrows
(hey, we can already make guns/bullets)
-Some Bone weapons/armors (not enough to really get in the way of dedicated armor/weapon smiths, but some bone (mail) armor and weapons would be kinda cool)
-Staves and other wood based weapons (spears would probobly be one also)
-Poisons (not that having Nature Craft would let you use them, but you could make them for rogues)
-Nature Pets (squirrel, bluejay, snake, etc)
-Universal Pet Food (for hunters pets ^_^ one food feeds all)
-Cart (would be a trinket used after you summon your mount. depending on the level of cart, you would be able to let 2-4 players hop on your cart for a ride. would make it so you dont HAVE to have a level 60 mount to keep up with a level 60, as long as they were willing to give you a ride)
-Cloak of Camaflauge (sp?) (would give you a 1-time use of shadowmeld-like effect, or be on a 10-60 minute cooldown)
-Stink Bomb (3 second fear that would use your poison resist instead of normal fear resist, with a cooldown obviously)
-Traps (poison dart traps, snares, stuff like that)
-Poisoned Food (for dealing with beasts, you could toss them the tainted food and knock them out for a while)
-Fishing Poles/Fishing Lores (Natural fishing lores would just be an alternative to Engineering, but Engineering should lose poles, other than the advanced mechanical ones, and instead get fishing grenades XD made in stacks of 5, your char would drop a bomb into the water and you would click on the dead body of the fish when it rose to the surface of the water to catch it, lol. Pretty much just cause it would be funny)
-Could make Resins using some of the higher level herbs for stronger leather armor crafting for the leatherworking profession
-Could use some herbalism components to create stronger mixtures for herbalism (ex: 5 peacebloom and 5 silverthorn = silverbloom paste, stuff like that, that would be used by alchemists to get stronger, new recipes)
-Beast Whistle (you could craft whistles of different levels that could be used as a lore to summon a beast, which you would then be able to tame (if your a hunter, if the beast is tamable) or kill it. the better the whistle, the higher the level it would summon)
-Lesser Poisons (use herbalism to make minor poisons that do not add effects like a rogues poison. these would simply be procs to do poison damage that would take the place of an enchanting spot on your weapon, and would not be a DoT)
Like I said on the main site also, this would be a lot of stuff for one profession alone to have, but it's a nice pot of various things that could be picked and chosen from :)