Recently I've been discussing with Janne Haydn's use of sonata form in his symphony no84 (in this forum and by PM). It's possible to pick up things by careful listening certainly, but it isn't really as precise as looking at a score. Unfortunately many find reading a score difficult and with a miniature score of an orchestral work there is alot to follow as well.
On youtube I found some interesting animations (by someone called Smalin) probably using some midi technology which help show the score easier. He created the program himself and it is available for people to use.
What do you think of these as a way of looking at music and analysing it. Of course it doesn't show everything like changes of key but it does help lay bare some aspects of the score such as the shape of the ideas. Looking at notes on an actual score isn't so clear as this particularly for those not used to looking at scores.