I have found that to shape my biceps I have used exercises that include front delts. this is based on a theory of connective tissue and fascia. anyway basically once per bicep workout I do an exercise where I basically lose my form in a slow and controlled manner.
For example:
1. 60* incline bench curls like stated above, but have arm extended straight down like it would when you are just letting it dangle, then when you contract, move the shoulder a little until you are fully contracted in bicep and front delt is activated also. so first the weight will move then when you are almost completely (if not completely) contracted, the elbow raises a little.
2. curls like front double bicep pose: curl like pulling arms toward your head, then actually move the weight toward your head, this should activate your shoulders and if you are lean like me you might be able to see the muscle fibers contract more even after the bicep is completely contracted. (I knew a very big guy who only trained with weird methods that worked the muscle connective tissue)
3. 4:50 into the "show", it shows milos' trainee doing curls with the pulley, his shoulders move slightly. I put a little more emphasis in making sure my shoulders get some tension from the bicep. It's almost like losing your form and being less of an isolated movement. here's the link
http://thefitshow.tv/index.php?optio...son3&Itemid=71