I'm awfully excited to note (belatedly) that Banshee, the free/open music player for GNU/Linux, turned 1.0 a couple weeks ago while I was still on the road. When I first surveyed all the music players available for Ubuntu, Banshee looked the most promising, but it was still in a fairly unstable beta. Now that it's finished, I'm happily importing all my playlists and chortling to myself. Basically, this does everything iTunes does — including video playback, podcasts, remembering last-played position for audiobooks, ripping and burning — and acts more or less like iTunes. But there's no DRM, it natively drives players other than the iPod (it supports iPods too),
