Songbird

I've been trying Songbird for 2-3 days until now.
Pro:

• By using a simple interface that is quite similar to iTunes you'll be able to discover really new music
  

Cons:

• It's a relatively new app and there is still plenty of bugs
• That GUI really does look like iTunes
  

Big Con:

• Is it so difficult to write an iPod library that works with an old Black 1G Nano?!? And are we sure that each project aiming at communicate with an iPod writing its own library will finally provide a working piece of bytes?

BTW: Give Songbird a try because, if you want to discover new music every day, it really deserves your attention.