I'm armorsmith @ 300 skill and i'm very happy to be!
AFor a long time you won't have anything useful, perhaps the
http://wow.allakhazam.com/db/item.html?witem=12628
But nothing great to make money with at all. Well, if you have the luck to receive one of the following plans:
http://wow.allakhazam.com/db/item.html?witem=12717
http://wow.allakhazam.com/db/item.html?witem=12720
Armorsmithing is the best profession in the game, people will pay you 50-100g just for the click on the button to make the item, they bring all mats, yo ujust build and earn a lot of gold, since those plans are extremely rare.
But, it's quite unusual to get this, anyway as an armorsmith you are still needed, dark iron armor or other special armor with resistances, like the new dark rune-items are at your disposal, a weaponsmith is useless in late-game, he cannot make any great epic-items, except for the weapons from the thorium bortherhood and you almost always have a better laternative found in an instance.
I got the Lionheart-Helm as first smith on my server, I made about 1500g with it so far and I never got the mats to sell one