Ah, the converted heroes looked like a great spot when I was checking areas to grind (the crystallized fire drop cave in Storm Peaks being another..) out to 80 on my paladin/4xshaman team. I'm halfway through 76 right now, and as soon as I hit 77, it's flying time to Icecrown along with the Sons of Hodir quest chain & dailies.

Instance grinding isn't too bad though. I went nearly all of lvl 73 with around half a dozen UK runs on rested xp. A big chunk of level 75 was a couple OK runs. This far along, I'd rather do just about anything but questing.. especially since I'm currently in the mad collection quest zone known as Grizzly Hills.