I have sort of an opposite wish for the chapter detection feature. I'm a big fan of podcasts that tell a story per season or whatever you want to call it. Lot's of them have an intro ad for an indeterminate period of time and signal the beginning of the episode with an intro blurb usually voice over of 'welcome to ..' with some background music. I really don't mind listening to the ads the first time through but would love to save whole seasons without the leader ads as an M4b file - I've thought about writing this in the past, just haven't gotten to it. The ability to detect those points in a series of mp3s and bundle them up into an m4b would be super useful in my book.