I usually don't do an actual post calling out new blogs that I am reading, but usually just add them to my links. But on the heels of my post last week about making gold, plus a weekend after which I made a pretty penny because someone else on Drenden (thanks someone else!) decided to post a bunch of elixirs of deadly strikes for 14g each, I wanted to alert folks to two great blogs I've started reading. They're not new, so perhaps you already know of them.
Warcraft Econ also includes a lot of good general summary info. I especially love Greedy Goblin because there is talk around demand curves, tax curves, AH "etiquette" and other topics that amuse the geeky economist side of me.