Futzmonkey commands me to try Songbird, now that version 0.6 is officially out.
Spiffy thing: It will import your iTunes songs “in-place” so that you can play anything you’ve got in iTunes (well, not DRMed stuff I guess) through Songbird. So — instant library ready to use!
Videos as well as audio. Podcasts too. It’s all imported in there.
I’ll give it a spin.
UPDATE: cool, but I have iTunes. Oh well.