I have the MGTek plugin but have yet to install it as my iPod is currently okay...however, come time to sync and add new playlists to my pod, I'll definitely give it a try.
I've currently used MusicBridge MusicBridge - Free software downloads and software reviews - CNET Download.com
and it worked really, really well. I am especially anal about tagging, categorizing, and converting to mp3 ALL of my songs from iTunes, so maybe that's why it worked so well for me. Either way, my Media Player/Center now have all of my music archived, and that's very exciting for me and due to MusicBridge.
This works fine for me now since I really only use my iPod for music, though it's got video, podcast, etc. capability. Eventually I'll probably end up gifting it to a friend of mine and either getting a Zune or a smartphone (maybe a Nexus with Google Music...?!) that can play mp3's (unless for some reason I end up buying a Mac...*shivers in fear*).