I mainly do neutral grip pullups, a little wide than shoulder width. These really hit the lats nicely, and don't bother my shoulders when they're healthy.
I usually do 4 sets of 6 or so; at one point I was weighting them with 15 lbs. for 5 sets of 4, but I had to back off for a while thanks to a bum shoulder. I just started them again and haven't tossed weight on yet.