[Zubersoft]

I've received a number of requests for displaying the combined duration of songs in a setlist (along with dividers that can be used to show duration up to a certain point in the setlist), so it seems to be something that a lot people would benefit from. I'm going to try to make time for features like this soon.

As for automatically populating duration, I actually already support this. You just have to enable the option to populate metadata when importing audio files.