My cross faction trading has been very limited and I’m basically buying only a few items on my horde toons to get some gold over to the alliance and then I simply use my alliance toon as a second source of mats for the horde crafting side. I’d love to actually work both ah’s at once but I just don’t have the time! Just looking at the sheer volume of items I post horde side (2-3k!!!) I can’t imagine doubling my time and posting the same quantity on the alliance side. For now my alliance friends will remain my suppliers of materials :D (mmm titanium ore for 8 gold a piece? yum!).