I've made about 200g selling ports to Dalaran (EDIT: 310 now, but newer figures are periodically updated on the blog banner) No lies. It helps to be one of the first mages to hit 74 on US Arygos. There are about 2 or 3 ahead of me, but I don't mind staying back to make some nice coin. The inner goblin tells me to go for the gold, not the glory!
Tomorrow or sometime this weekend, I'll be putting up some Northrend AoE guides as well as Frost boss strats for the first few dungeons that I've done so far.