some other places with good cash rates (several of these are also the ultimate places to grind the last few levels to 60):
Mosh'Ogg Maulers (elites) in STV. I'm getting steady 6-7g in raw cash per hour, along with mithril and iron, mage/silk... and greens in the high 30s. Almost no downtime. One downside is there are only so many of them but it works out fairly well to keep constant pace. if iron, heavy stone, mage and silk fetch a good price and you have a good market in the 30s for selling greens... this is a nice spot.
Jadefire Satyrs in the SW of Felwood are nice cash. Around 6g with ok drops and chance at felcloth. Not sure about other drops but i know many people have been able to quietly farm tons of cash there.
Deadwind Brutes/mages/warlocks are also about 7g per hour and one of the very best sources of runecloth. Not many greens or blues will likely drop, but if you have a strong inlking to quietly farm and sell fuckloads of runecloth, this is a great spot. You will get occassional greens from locks/maulters along with lots of valuable greys. Not dont expect uber-drops.
Deadwind "master's cellar" is one of my fav spots from that past. Tracking gold per hour i'm getting 7g per hour in raw cash. You will also get decent runecloth and other drops including nice ones. One of the greatest benefits of this spot is... you will seldomly see other players there.
EPL Noxious Glade is a classic farming spot. 4-5g or so depending on what you grind. This is also a great place for runecloth. There is also rich thorium here and other stuff drops. The raw cahs isnt the best but you do find some rare drops and have the steady rich thorium as well. However, that thorium makes is a regular spot for other farmers. You also of course can get Argent Dawn stones and Essence of Undeath which can be both very useful.
** These figures were with Titanbar and using a hunter, focused on a steady pace with minimal downtime.