So what do you guys do for monies? Here are some opportunities I've seen:
Herbing: People are lazy and don't want to herb themselves even though they need pots for the raids. By having a flying mount (epic would be optimal), riding crop and some free time, you can cash in on this fat cow that the PvE biased BC has generated. Specifically on my serv Netherbloom was at over 30g a stack zoh my gawd!

Alchemy: Specced correctly you can get more out of herbs and get extra pots. Mellee are a dime a dozen but casters always love (and will pay for) the things that can keep their pew pew up. I'd suggest going for Elixir of Mage Blood > Super Mana Pots > Healing Power > Shadow Power. Alternately, having a primal might, trading it straight up for mats, transmuting it later, while being xmute spec might land you a good chunk of change every once in a while.
Rep Rewards: Sunfury Signet & Mark of Sargeras are always in demand and being a grindinator works to your advantage. On my serv Marks of S go for about a 1g a pop and I know that several spots up at blades edge and SMV do give you quite a result for your efforts.
Disenchanter: Got your enchanting up? Can't get the enchants that are in demand or everyone else is whoring themselves out, effectively taking you out of the market? Disenchant! Grind, disenchant then sell reagents. Greater Planars go for about 5g a pop on Boulderfist, and Arane Dust is 2g per. Easy money if you horde up your BoE's and quest rewards that you've marginalized for a while. You can even disenchant for a tip... now how easy is that? Just make sure you don't mix up your reagents that you had previously with what they should get back

Primal War: Primals are now needed even for enchants not to mention the huge amounts that it takes to craft items. Averaging for around 20g a primal, there is a big market for these and you might play an unusual angle. Most times people already have motes lying around from random grinding/questing so you may want to cater to those types of players, the ones that don't need to buy a complete primal. If you have 10 motes you might want to put up auctions as follows: 1x[ 3xMote ] 2x[ 2xMote ] and 3x[ 1xMote ]. If you want to go for singule motes all the way, you may want to just do a slight increase of the Primal/10 price.
Netherweave: Everyone needs it, PvE, PvP, via Bandages, Tailoring, erm... well that's just it but boy does it sell!
Consortium: You may not be proud enough to admit it but some of you have consortium rep, but you may be pleased to know that you get a goodie bag of gems once a month. It's true! http://www.thottbot.com/?s=Membership+Benefits the more rep you have the better the gems.
Always keep in mind, it's rude to undercut a guildie or a friend, so play nice and happy hunting!
Just some thoughts.
