Some new hotness in Banshee 1.5.3 the fantastic Linux media player written in Mono. Among the new stuff is something I'd love for iTunes on my Mac to have, folder watching:

A long requested feature - already present in Rhythmbox - has been the ability for Banshee to watch your libraries' folders for added, renamed, or deleted files and updating Banshee accordingly. Well - it's here! (Although you have to enable it via the Extensions menu).