Primal Vortex
We have no way to fuel guild banks atm, so people have to provide their own flasks and consumables (even our prot warriors) for raiding, aswell as respecing for Gruul.
I've heard that a fair amount of people have now turned to account shareing in order to have access to Herbalism.
Leveling an alt to 70, then getting him a flying mount, and then an epic flying mount because the normal one drives you mad after getting used to the epic one, is not fun just to enable you to farm so you can raid on your main character.
I personally tried this, and decided its not worth the risk, my old rogue (62) is a tailor and makes me 250g per 4days with Mooncloth(spec) & Spellcloth, which I splash into herbs off the AH - simple.
Only thing our 'guild bank' can do atm is provide our melee with Void Crystals which we get from Karazhan for their Mongoose enchant.