My farming strat at the moment is to load up the quest before the warden in act 1 inferno. By the time you get to the butcher you should have 5 neph valor. I get ~50k gold per run just from drops and selling junk to NPCs. I also swap in a full set of MF+ right before killing bosses/elites.
This is my strategy, and seems to be the most common.
Gotten 800+ DPS Xbow that sold for 1.2m (when high DPS weapons were more scarce on the AH), and several other items that sell for 400k+. Very lucrative run. Additionally "Exalted Sovereign" items made from the Blacksmith are quite profitable too, 5 affixes and if you get "resist all" on any of those slots you could probably sell it for 500k-2m (50k synth, but will take several runs to get the mats for it).
Edit: unfortunately the "Exalted Sovereign" recipes are mostly made from plans and not leveled up recipes, which are very rare drops and are not currently sold on the AH.