I have not made a ton of gold in D3. The main reason is that I keep spending it on upgrades for my Barbarian. In the meantime, I have been farming Warden to Butcher on act one for some extra loot and gold. Now for that gold tip. Blow up all level 60 blue items, do not vendor them. I was selling the essences that drop from level 60 blue items for 2000 gold last night and they were selling instantly.
Overall yesterday, I went from about 800k to 1.5 million on D3. Part of that was the above essence selling, and part of it was a couple of decent flips. Sold a two hander I grabbed for 10k for 75k and sold a chest I purchased. for 5k for 125k. When I log on, I first look for any good deals based on very specific parameters. If I find something, I flip it.
My WoW milestone also has to do with making gold. In the last few days, I hit 3 million gold. The 240 Queen's Garnet that I bought have paid off well. I still have around 100 of them left.
In other D3 gold making news, they made it so you cant start too many games in a short period, which means that many of the farming areas are going to be farmed less. I will probably just continue running the Warden/Butcher run.