I've started using the USTA Player Development exercises post-op/post-PT to continue building strength in the shoulder:
http://www.playerdevelopment.usta.co...inewsid=249182
There are a number of shoulder/back exercises. The best part of the routine, as a non-gym member, is that I can do the entire routine with exercise tubing and a medicine ball.
This may provide some guidance/suggestion for those not already on a physical therapy program for shoulder issues.