I have a folder on my laptop for podcasts, and an external drive which holds the music collection. I have turned off "Watch folders for changes" so Amarok won't forget the music collection (and have to rescan) whenever the removable drive is missing, but now it won't notice new podcasts either.

So, is there any way to tell Amarok to only scan part of the collection? If not, how could I go about implementing one? A script?

Ah, I have just seen this, which looks like what I want. Sorry to bother you!