
The Tune Blocker is a product from Matias that acts as a sort of cable gateway between your iPod and your computer/iTunes. If you own an iPod, you’ll know that it’s sometimes annoying to connect your iPod (or somebody else’s iPod) and watch as iTunes opens and syncs your media. Sometimes, you just want to charge your iPod via the computer — not sync it!
So the Tune Blocker has a switch that allows you to plug the iPod in without making it launch iTunes. [via]
A 3ft cable costs $19.95 and a 6ft cable costs $24.95. I would like one of these.

you can change this setting within itunes itself, so after connecting your ipod for the first time, this should no longer be a problem. much better than spending $20+ on a cable
http://discussions.apple.com/thread.jspa?messageID=3681951
yeah man. isn’t this something you can uncheck in the settings?
they need to make it where you can upload songs from someone elses itunes library to your ipod, without erasing what you already have.
Ya, the setting is there in the first tab – at least it is for an iPhone…
@Amanda Nicole
i think you can do that if you manually manage your music (as long as the song from the other person’s library is not in a protected format). i don’t, so i can’t verify this, unfortunately.
Alternatively, check the box to “enable disk mode” in your ipod settings. Then you can use it like a flash drive to copy the song(s), assuming you have the space free. You’d still have to copy it to your hard drive and add to your itunes library once you return home to listen to it, unfortunately, and it would still be subject to the same drm protections as the original file.