there are no craftable items to my recollection that uses bop items to create boe item. i highly doubt anything will be different here.
correct me if i'm wrong though...
There are many. In fact, as of now, I can make:http://www.wowhead.com/?item=29724http://www.wowhead.com/?item=29729http://www.wowhead.com/?item=29733http://www.wowhead.com/?item=29732http://www.wowhead.com/?item=29734http://www.wowhead.com/?item=29728http://www.wowhead.com/?item=29731
They all require a Primal Nether each.
Anyway, without further discussion about the amount of time and $$$ I've spent on the AH, my general impression for BOP materials --> BOE items is as stated earlier in the thread; so that there's a reason to actually have various different professions in the raid and not a set of herb/alch clones.
As to Primal Nether/Nether Vortex, this reminds me a little of how MC fire resist crafting mats dropped in MC, and helped the guild prepare for Ragnaros. Instead of resist gear though, these are general gear upgrades for your raid should you have the relevant profession and recipes in the raid force.
Selling it to the casual crowd? I'm sure it'll come about sooner or later (just like people selling FR on the trade channel late in WoW 1.0's lifetime) but at the rate Nether Vortexes are dropping, (seeing as we've only now heard of them yet ~10 have killed Hydross), I'd say the recipes that require them are going to be in-guild deals for quite some time.