i gave it a shot on my dk last night in an attempt to help instance boost my little druid...had a bit of a time getting it to ork right so i'm not too sure if i did it right
my settings:
on tank himself left on group loot and greens as threshold
passloot to yes so the only thing that appears loot-able is the greens and up on the dk
hb in the instance farming mode took and put loot mobs to yes and pull distance to 50
set it up for stratholme main gate and got both toons in the instance
started up hb and after downloading the meshes it didn't want to immediately start, so i did a quick target of the first closest mob and idk what i did different but it started farming the instance after that... only problem i had is my druid either kept getting too far out of range if i didn't have hb running or tried to attack the mobs if raf/assist was on it and dk's as it turns out fail at rezzing... will try on my pally sometime this weekend, but as i see it, this is deffinately a babysit kinda thing