4.2 update and empty iPod...Fix inside.
Was browsing around iDygest and noticed they were talking about an issue with the 4.2 update, specifically with the iPod being empty after the update. I took a look in my own iPhone and sure enough, my iPod was empty.
The article has the following fix:
Worked like a charm, everything...including selected podcasts, went back onto iPhone just how it was before the update.
"After you update to the new OS, if you load the iPod app, you may see a message stating that your currently have No Content on the device, The way to fix it is apparently to plug your iPhone back into your computer, play a song from the iPhone on your computer and then resync."
Hope this helps some folks, i would have been quite pissed if i had headed out on a thanksgiving car trip and had nothing on my iPhone, lol.