It's come to my attention when upgrading that sorting by date added to library or first/last played is not all that useful a measure of which songs are newer to you as they all get added at the same time.

It would be much more useful to use the file creation date then you can build an accurate timeline of what music you acquired when, play newer stuff you might not have got round to listening to yet, have a nostalgia trip, regardless of whether you've always used amarok or not. Granted it isn't perfect and falls down if you move stuff, but it would work in more cases than date added to library.

What do you think? Good idea?

I also would like this.  In Amarok 1.x I can create playlists of files most recently added to my disk by an arbitrary number of days, weeks or months back.  I have all of my music files on an external network drive and I sometimes forget to remount the drive after a reboot before starting Amarok 2.  This means that I have to do a rescan which makes everything in the database the same date.

You'll probably appreciate the new playlist config tool then Not sure if it made it into 2.0.2, but is in svn and will def. make it to 2.1