hmm........this does look like quite the problem..but ill give it a shot--i grow tomatoes regularly, and i've never seen this before. Try snapping some of the branches without any
flowers on it-this helps gives the
plant that energy it was using on the branches to use it on the
plant/fruit itself. Try fertilizing(i use miricle-grow)every other day or 3times a week. How is the soil? maybe the roots arent getting the nutrients it needs. How often do you water? You might have planted everything too close together, causing the roots to gather together or croos each otehr too much. If i think of anything else, i'll post again--hope this helps!