Here is the source I've been using for my WotLK info (mostly), this link in particular going to the blacksmith portion of the site. ze, you mentioned shields, and blacksmiths will be able to make some shields now :D Just wanted to show ya that ;)
As far as BoP armorsmith only ones, I'm in agreement that that would be huge! I would love to see a 3 tiered epic tanking shield much like the current weaponsmith items and armorsmith DPS chests.
Anyway, as per my previous post: Chestplate of Conquest and Legplates of Conquest under the "new armor recipes" section are the items I was referring to earlier if you are interested in taking a look. Again, they're itemized for DPS, but if you're interested at all in respecs to Ret, might be ok for ya.
And as an edit to my previous post, they have some weaponsmith only items listed too: 2 1-handed swords and a 2-handed mace, neither of the swords I'd use for tanking though =/ There's also the source listed for the possibility to socket items with metas for an armorsmith, but whether that idea is actually in place (or will be) I can't confirm nor deny.