Question
I use iTunes to download your weekly podcast, as well as several other public radio podcasts (Car Talk, Wait Wait, etc), using my home desktop. When I’m on the road (as I am the coming week, when we will be driving down Route 1 from SF to LA), I use iTunes on my laptop to download the podcasts. However, the two computers are not synchronized.

If I haven’t used the laptop in several weeks, I find that I am downloading program episodes that I have already heard when using the desktop. Is there some way to synchronize iTunes on the two computers (the only iTunes feature I use is to download podcasts)? Does iTunes, for example, use a data file that I could copy from the desktop to the laptop just prior to leaving on a trip?