I don't think iTunes is scriptable in Windows, though; it's done through AppleScript in OS X and from what I understand Apple never bothered to adapt it for a Windows-compatible scripting language.
Oh good point, I didn't think about that.
vudu, what about the Music tab on the top of the iPod summary window? Can you click that and make sure nothing is syncing there? If nothing is set up to sync, try actually selecting some other things to sync (if you have any in your library), syncing your iPod up, and then going back and unchecking all the sync options, and syncing a second time to remove everything. That might flush your system out. If that won't work, what about restoring the iPod?
vudu, so the podcast in question is showing up in the "Music" section of your library instead of the "Podcast" section?