Version:            (using KDE KDE 3.3.0)
Installed from:    Compiled From Sources

A kind of Auto DJ function like they use it in Music Match Jukebox would be fine. You enter a time you want to listen to music (like 3 hours) and preferences (like artists, albums or rating) and the program fetches the tracks to fullfill your wish automatically. You don't have to fill the playlist by hand.

Perhaps just take a look at the music match software (if you know somebody who still has windows installed)