I'd like to do some specific queries that can be saved and reach beyond what the freeform search can perform, unless I've missed something.
It looks like the database is SQL based, this should be pretty easy to add in.
For example, I use the comment field in the id3 tag to say which country the artist is from, UK, US, NZ, AU etc. etc. So what if I wanted to pull all British bands from the 80's ?
This would, of course, mean importing the comments into the database too. Since I'm sure a lot of people don't care for tag comments, maybe this can be a configurable option.